In depth comparison and review of ASUS Zenfone 8 and Samsung Galaxy S23 Ultra. Compare sizes, cameras, batteries, memory, and other important specifications and features to easily choose the right phone for you. Our goal is to help you uncover differences between the products and find the phone that will best fit your needs.
| DESIGN AND DIMENSIONS | ASUS Zenfone 8 | Samsung Galaxy S23 Ultra |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | ZS590KS | SM-S918B/DS | |
| Form Factor | Touch | Touch | |
| Height | 148 mm | 163.4 mm | Samsung Galaxy S23 Ultra has greater height than ASUS Zenfone 8. |
| Width | 68.5 mm | 78.1 mm | Samsung Galaxy S23 Ultra has greater width than ASUS Zenfone 8. |
| Depth | 8.9 mm | 8.9 mm | Both phones are the same depth. |
| Weight | 169 g | 233 g | ASUS Zenfone 8 is lighter than ASUS Zenfone 8. |
| Body Colour | Obsidian black | Lavender | Cream | Green | Phantom black | |
| Body Material | - | PET film, recycled glass, Armour Aluminium frame | |
| Protection | Drop-proof, water-resistant, dust-resistant | Dustproof, splashproof, water-resistant | |
| Waterproof (Water-resistant) | Yes | Yes | Both phones are waterproof. |
| IP rating | IP68, IP65 | IP68 | |
| Repairability Index | - | 8.2 (out of 10) | |
| SAR Value | 1.582 W/kg (body), 1.412 W/kg (head), 3.498 W/kg (limb) | 1.398 W/kg (body), 0.963 W/kg (head), 2.95 W/kg (limb) | |
| Integrated Components | FM radio | - | |
| Connector Type | USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
USB Type-C - 24 pin USB-C | |
| SIM Card Type (Size) | Nano SIM | Nano SIM, Electronic SIM card (e-SIM) | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | ASUS Zenfone 8 | Samsung Galaxy S23 Ultra |
|---|
| Display Type | OLED display | OLED display | |
|---|---|---|---|
| Display Technology | AMOLED | Infinity-O Dynamic AMOLED 2X | |
| Screen Size (Display Size) | 5.9" | 6.8" | Samsung Galaxy S23 Ultra has larger screen size than ASUS Zenfone 8. |
| Screen Resolution (Display Resolution) | 2400 x 1080 pixels | 3088 x 1440 pixels | Samsung Galaxy S23 Ultra has better screen resolution than ASUS Zenfone 8. |
| Display Format | Full HD+ | QHD+ | |
| Pixel Density | - | 500 ppi | |
| Aspect Ratio | 20:9 | - | |
| Max Brightness | 1100 cd/m² | 1750 cd/m² | Samsung Galaxy S23 Ultra has better display brightness than ASUS Zenfone 8. |
| Colour Depth | - | 16.7 million colours | |
| Contrast Ratio | - | 3000000:1 | |
| HDR | Yes | Yes | Both phones have HDR. |
| HDR Technology | HDR10+ | HDR10+ | |
| Display Enhancement Technology | DC Dimming | Vision Booster technology | |
| Display Refresh Rate | 120 Hz | 120 Hz | Both phones have the same refresh rate. |
| Touch Sampling Rate | 240 Hz | 240 Hz | |
| Display Features | Always-on display, Glove Touch, Delta-E < 1, 107% NTSC, 151.9% sRGB, 112% DCI-P3 | AOD(Always On Display), Video Wallpaper, 100% DCI-P3 | |
| Display Protection (Screen Protector) | Corning Gorilla Glass Victus (scratch resistant glass) | Corning Gorilla Glass Victus 2 (scratch resistant glass) |
| PROCESSOR | ASUS Zenfone 8 | Samsung Galaxy S23 Ultra |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 888 5G | Qualcomm Snapdragon 8 Gen 2 | |
|---|---|---|---|
| Clock Speed | 2.842 GHz | 3.36 GHz | Samsung Galaxy S23 Ultra has higher clock speed than ASUS Zenfone 8. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| Graphics System (GPU) | Qualcomm ADRENO 660 | - |
| MEMORY | ASUS Zenfone 8 | Samsung Galaxy S23 Ultra |
|---|
| RAM | LPDDR5 SDRAM - 8 GB | LPDDR5 SDRAM - 8 GB | Both phones have the same RAM size. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 128 GB | 256 GB | Samsung Galaxy S23 Ultra has more internal memory than ASUS Zenfone 8. |
| User Memory | - | 216.6 GB | |
| Memory Interface | UFS 3.1 | - |
| CAMERA | ASUS Zenfone 8 | Samsung Galaxy S23 Ultra |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 2 | 4 | |
|---|---|---|---|
| Sensor Resolution | 64 Megapixel | 200 Megapixel | Samsung Galaxy S23 Ultra has better camera resolution than ASUS Zenfone 8. |
| Sensor Size | 1/1.7" | - | |
| Sensor Name | Sony Exmor RS IMX686 sensor | - | |
| Lens Type | Wide-angle lens | Wide-angle lens | |
| Lens Aperture | F/1.8 | F/1.7 | Samsung Galaxy S23 Ultra has better lens aperture than ASUS Zenfone 8. |
| Field of View (FoV) | 78.3 degree(s) | 85 degree(s) | Samsung Galaxy S23 Ultra has larger lens field of view than ASUS Zenfone 8. |
| Pixel Size | 1.6 μm | 0.6 μm | ASUS Zenfone 8 has larger camera pixel size than Samsung Galaxy S23 Ultra. |
| Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | Dual OIS (Optical Image Stabilisation) | Both phones have optical image stabilization. |
| Focus Adjustment | - | Automatic | |
| Laser Auto Focus | - | Yes | |
| Minimum Focal Length (Focal Distance) | 26.6 mm | - | |
| Self-Timer Delay | - | Yes | |
| Special Effects | - | Super HDR, face retouch, Grid Line, selfie colour tone | |
| HDR Mode | - | Auto HDR mode | |
| Camera Modes | Slow motion video, Time-lapse mode, Pro mode | Panorama, Slow motion mode, Pro mode, HYPERLAPSE, Super Slow-mo, Flowers, Greenery, Trees, Sky, Beaches, Watersides, Snow, Backlit, Text, Food, Face, Baby, Person, Dog, Cat, People, Sunset, Sunrise, City, Waterfall, Scenery, Stage, Vehicles, Drinks, Animal, Shoes, Indoor, Clothes, Night view, Portrait, Night, Motion Photo, Mountain, Filter mode, Single Take, Pro Video, Portrait video, Director's View, Expert RAW mode, My Filter mode, Astrolapse | |
| Light Source | LED flash | High CRI LED flash | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, 3840 x 2160 (4K) at 30 fps, 3840 x 2160 (4K) at 60 fps, Slo-mo video 1920 x 1080 (1080p) at 240 fps, Slo-mo video 1280 x 720 (720p) at 480 fps, 7680 x 4320 (8K) at 24 fps, Slo-mo video 3840 x 2160 (4K) at 120 fps | 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, 3840 x 2160 (4K) at 60 fps, Slo-mo video 1920 x 1080 (1080p) at 240 fps, Super slow motion video 1920 x 1080 (1080p) at 960 fps, 7680 x 4320 (UHD 8K) at 24fps, Hyperlapse 4K video support at 30 fps, Super Steady 1080p video support at 60 fps, 7680 x 4320 (UHD 8K) at 30fps, 3840 x 2160 (4K) HDR10+ at 60 fps, Director's View 1920 x 1080 (1080p) at 30 fps | |
| Camera Features (Functions) | Phase Detect Auto-Focus (PDAF), 3-axis electronic image stabilisation, 4-axis optical image stabilisation, Motion tracking, Quad Bayer technology, 2x1 On-Chip Lens (OCL) | Blink detection, QR-code scanner, RAW image capture, VDIS (Video Digital Image Stabilisation), Tracking AF, Quick Share, Scene Optimiser, Lens smudge, Flaw detection, Shot suggestions, blur detection, HDR10+ recording, Super steady, backlighting detection, Quick Measure, Zoom-In Mic, HEIF image capture, Take 33MP still photos while playing 8K video, Single Take, AR Doodle, HEVC (High Efficiency Video coding) support, Auto framing, UW shape correction, Auto FPS, object eraser, Digital zoom up to 20x for video, High Bitrate, 360 Audio Recording |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 12 Megapixel | 12 Megapixel | Both phones have the same second camera resolution. |
|---|---|---|---|
| Sensor Size (2nd Camera) | 1/2.55" | - | |
| Sensor Name (2nd Camera) | Sony Exmor RS IMX363 sensor | - | |
| Lens Type (2nd Camera) | Ultra wide-angle lens | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | F/2.2 | F/2.2 | Both phones have the same second camera lens aperture. |
| Field of View (2nd Camera) | - | 120 degree(s) | |
| Pixel Size (2nd Camera) | 1.4 μm | 1.4 μm | Both phones have the same second camera pixel size. |
| Focal Length Equivalent to 35mm Camera | 14.3 | - | |
| Camera Features (2nd Camera) | Real-time distortion correction, 4cm macro photography, Dual Phase Detect Auto-Focus (PDAF) | - |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | - | 10 Megapixel | |
|---|---|---|---|
| Lens Type (3rd Camera) | - | Telephoto lens | |
| Lens Aperture (3rd Camera) | - | F/4.9 | |
| Field of View (3rd Camera) | - | 11 degree(s) | |
| Pixel Size (3rd Camera) | - | 1.12 μm | |
| Optical Zoom | - | 10x | |
| Camera Features (3rd Camera) | - | 100x Super Resolution Zoom, Space Zoom |
| FOURTH CAMERA |
|---|
| Sensor Resolution (4th Camera) | - | 10 Megapixel | |
|---|---|---|---|
| Lens Type (4th Camera) | - | Telephoto lens | |
| Lens Aperture (4th Camera) | - | F/2.4 | |
| Field of View (4th Camera) | - | 36 degree(s) | |
| Pixel Size (4th Camera) | - | 1.12 μm | |
| Optical Zoom | - | 3x |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 12 Megapixel | 12 Megapixel | Both phones have the same front camera resolution. |
| Sensor Name (Front) | Sony Exmor RS IMX663 sensor | - | |
| Lens Aperture (Front) | F/2.4 | F/2.2 | Samsung Galaxy S23 Ultra has better front lens aperture than ASUS Zenfone 8. |
| Field of View (Front) | - | 80 degree(s) | |
| Pixel Size (Front) | 1.22 μm | 1.12 μm | ASUS Zenfone 8 has larger front camera pixel size than Samsung Galaxy S23 Ultra. |
| Focus Adjustment | Automatic | Automatic | |
| Camera Modes (Front) | Portrait | - | |
| Camera Features (Front) | Dual Pixel technology, EIS video stabilisation, Dual Phase Detect Auto-Focus (PDAF) | 2PD AF |
| BATTERY AND CHARGING | ASUS Zenfone 8 | Samsung Galaxy S23 Ultra |
|---|
| Battery Capacity (Battery Size) | 4000 mAh | 5000 mAh | Samsung Galaxy S23 Ultra has larger battery capacity than ASUS Zenfone 8. |
|---|---|---|---|
| Fast Charging Technology | Qualcomm Quick Charge 4.0, Power Delivery 3.0 | Qualcomm Quick Charge 2.0, Adaptive Fast Charging, Samsung Super Fast Charging, Power Delivery 3.0 | Both phones have fast charging technology. |
| Wireless Charging | - | Yes | Samsung Galaxy S23 Ultra can be charged wirelessly. |
| Wireless Charging Standards | - | WPC, Qi, Fast Wireless Charging 2.0, Wireless PowerShare | |
| Talk Time | - | 2940 minutes | |
| Run Time Details | - | Talk (4G): up to 2940 min Active online usage (LTE): up to 25 hrs Active online usage (Wi-Fi): up to 25 hrs Playback (wireless video): up to 26 hrs Playback (wireless audio): up to 99 hrs |
| CELLULAR | ASUS Zenfone 8 | Samsung Galaxy S23 Ultra |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 5G | 5G | Both phones have the same mobile network generation. |
| Operating System | Android 11 | Android 13 | |
| User Interface | ASUS ZenUI 8.0 | Samsung One UI 5.1 | |
| Intelligent Assistant | - | Bixby | |
| Payment Technology | - | Samsung Pay | |
| Navigation | GPS, GLONASS, BeiDou, Galileo, QZSS, NavIC | GPS, GLONASS, BeiDou, Galileo, QZSS |
| COMMUNICATIONS | ASUS Zenfone 8 | Samsung Galaxy S23 Ultra |
|---|
| Data Transmission | GPRS, EDGE, HSPA+, FDD-LTE, TDD-LTE, DC-HSPA+, Gigabit LTE, 5G NR FR1 | FDD-LTE, TDD-LTE, 5G NR FR1 | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 3G UMTS Band | Band 1, Band 2, Band 3, Band 4, Band 5, Band 6, Band 8, Band 19 | Band 1, Band 2, Band 4, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 1800, 1700, 850, 800, 900, 800 | 2100, 1900, 1700, 850, 900 | |
| 4G LTE Band | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 17, Band 18, Band 19, Band 20, Band 26, Band 28, Band 34, Band 38, Band 39, Band 40, Band 41, Band 42 | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 13, Band 17, Band 18, Band 19, Band 20, Band 25, Band 26, Band 28, Band 32, Band 38, Band 39, Band 40, Band 41, Band 66 | |
| 4G LTE Frequency | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700b, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 850+, FDD 700 APT, TDD 2000, TDD 2600, TDD 1900, TDD 2300, TDD 2500, TDD 3500 | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700c, FDD 700b, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 1900+, FDD 850+, FDD 700 APT, FDD 1500 L, TDD 2600, TDD 1900, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3 | |
| 5G NR Band | N1, n2, n3, n5, n7, n8, n20, n28, n38, n77, n78, n12 | N1, n2, n3, n5, n7, n8, n20, n28, n38, n41, n66, n75, n77, n78, n40, n25, n12 | |
| 5G NR Frequency | FDD 2100, FDD 1900PCS, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 3700, TDD TD 3500, n12 | FDD 2100, FDD 1900PCS, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 2500, FDD AWS-3, SDL DL 1500+, TDD TD 3700, TDD TD 3500, TDD 2300, FDD 1900, n12 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac/ax | IEEE 802.11a/b/g/n/ac/ax, Wi-Fi 6E | |
| Bluetooth | Bluetooth 5.2 EDR | Bluetooth 5.3 | |
| Bluetooth Profiles | HFP, OPP, PAN, A2DP, AVRCP, HID | - | |
| NFC | Yes | Yes | Both phones have an NFC reader for mobile payments. |
| Ultra-Wideband (UWB) | - | Yes | Samsung Galaxy S23 Ultra has UWB wireless technology. |
| Modem | Snapdragon X60 5G | - |
| MEDIA | ASUS Zenfone 8 | Samsung Galaxy S23 Ultra |
|---|
| Supported Digital Audio Standards | - | WAV, AAC, PCM, AMR, MP3, FLAC, XMF, OGG, MIDI, APE (Monkey's Audio), M4A, DSF, DSD, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, DFF, MID, DSD64, DSD128 | |
|---|---|---|---|
| Supported Digital Video Standards | - | MKV, FLV, AVI, 3GP, M4V, WebM, 3G2, MP4 | |
| Sound Enhancements | Dirac HD Sound, ASUS Audio Wizard, Hi-Res audio certified, OZO Audio, Qualcomm aptX audio, Qualcomm aptX HD audio, Qualcomm aptX Adaptive | Dolby Digital Plus sound, Dolby Atmos sound technology, Surround sound, Dolby Digital sound, amplify ambient sound | |
| Audio Amplifier | Dual Cirrus Logic CS35L45 | - |
| FEATURES | ASUS Zenfone 8 | Samsung Galaxy S23 Ultra |
|---|
| Sensors | Accelerometer, ambient light sensor, proximity sensor, digital compass, G-sensor, gyroscope | Accelerometer, ambient light sensor, proximity sensor, barometer, gyro sensor, hall sensor, geomagnetic sensor | |
|---|---|---|---|
| Security Devices | Fingerprint reader (under display), face recognition | Fingerprint reader (under display), face recognition | |
| Additional Phone Features | MIMO technology, AudioWizard, One Hand Mode, ARCore, Triple internal microphones with ASUS Noise Reduction Technology, Multi-Magnet Stereo Speakers | S Pen multi-input, Air View, MIMO technology, Screen Write, notification flashlight, Smart Select, Three microphones, Samsung KNOX, Smart View, Live message, Screen off memo, Samsung DeX support, Bixby Vision, Secure Folder function, TalkBack, Dual Audio, Intelligent Performance Enhancer, Samsung Smart Switch, AR Doodle, PENUP, Bixby key, Bluetooth Scalable Codec, Samsung Knox Vault, DisplayPort over USB Type-C, dual stereo speakers tuned by Dolby Atmos, Samsung Seamless Codec, Samsung Wallet |
| OTHERS | ASUS Zenfone 8 | Samsung Galaxy S23 Ultra |
|---|
| Included Accessories | SIM card removal tool, USB-C to USB-C cable, protective case, power adapter (30 W) | SIM card removal tool, S Pen, USB-C to USB-C cable | |
|---|---|---|---|
| Compliant Standards | IP68, IP65, SGS Eye Care Display Certification, SGS Seamless Pro 120Hz Certification | VDE, IP68, HAC (Hearing Aid Compatible), EcoLogo, IEC 61960, Carbon Trust | |
| Max Depth of Water Resistance | - | 1.5 m | |
| Max Height of Shock Resistance | 2 m | - |
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