Side by side comparison and review of ASUS VivoBook 15 (X1504ZA) and Lenovo ThinkPad X13 Gen 4 (21EX). Compare dimensions, processors, batteries, storage capacities and other key specifications and features to simplify the choice of your perfect laptop. Our goal is to make it easier for you to decide on the laptop that will best meet your expectations by revealing the main differences between the products.
Advantages and disadvantages of ASUS VivoBook 15 (X1504ZA) based on its technical characteristics, features, user experience, expert reviews and price level.
affordable price
lightweight design
solid build quality
decent battery life
fast charging support
average display quality
limited graphics performance
no backlit keyboard
fewer USB ports
Advantages and disadvantages of Lenovo ThinkPad X13 Gen 4 (21EX) based on its technical characteristics, features, user experience, expert reviews and price level.
robust build quality
excellent keyboard comfort
impressive security features
good battery life
portable design
average display brightness
limited graphics performance
noisy under load
higher price point
| DESIGN AND DIMENSIONS | ASUS VivoBook 15 (X1504ZA) | Lenovo ThinkPad X13 Gen 4 (21EX) |
|---|
| Product Type | Notebook - 180-degree hinge design | Notebook |
|---|---|---|
| Dimensions (WxDxH) | 35.97 cm x 23.25 cm x 1.79 cm | 30.17 cm x 21.48 cm x 1.595 cm |
| Weight | 1.7 kg | 1.09 kg |
| Case Material | Plastic | Aluminium (bottom), carbon fibre hybrid (top) |
| Colour | Cool silver | Deep black |
| DISPLAY | ASUS VivoBook 15 (X1504ZA) | Lenovo ThinkPad X13 Gen 4 (21EX) |
|---|
| Screen Size (Type) | 15.6" | 13.3" - IPS |
|---|---|---|
| Screen Resolution | 1920 x 1080 (Full HD) | 1920 x 1200 (WUXGA) |
| Widescreen | Yes | Yes |
| Image Aspect Ratio | 16:9 | 16:10 |
| Image Brightness | 250 cd/m² | 300 cd/m² |
| Colour Gamut | 45% NTSC | 100% sRGB |
| Features | Anti-glare | Anti-glare |
| PROCESSOR | ASUS VivoBook 15 (X1504ZA) | Lenovo ThinkPad X13 Gen 4 (21EX) |
|---|
| CPU | Intel Core i7 (12th Gen) 1255U / 1.7 GHz | Intel Core i5 (13th Gen) 1335U / 1.3 GHz |
|---|---|---|
| Max Turbo Speed | 4.7 GHz | 4.6 GHz |
| Number of Cores | 10-core | 10-core |
| Cache | L3 - 12 MB | 12 MB |
| Platform Technology | - | Intel Evo |
| Features | Intel Smart Cache | Integrated memory controller |
| MEMORY | ASUS VivoBook 15 (X1504ZA) | Lenovo ThinkPad X13 Gen 4 (21EX) |
|---|
| RAM | 8 GB (provided memory is soldered) | 16 GB (provided memory is soldered) |
|---|---|---|
| Max RAM Supported | 16 GB | - |
| RAM Type | DDR4 SDRAM | LPDDR5 SDRAM |
| Speed | - | 4800 MHz |
| Rated Speed | - | 6400 MHz |
| Form Factor | SO-DIMM 260-pin | - |
| Slots Qty | 1 | - |
| Empty Slots | 1 | - |
| STORAGE | ASUS VivoBook 15 (X1504ZA) | Lenovo ThinkPad X13 Gen 4 (21EX) |
|---|
| Main Storage Size (HDD/SSD) | 512 GB SSD M.2 PCIe 3.0 - NVM Express (NVMe) | 256 GB SSD M.2 2280 PCIe 4.0 x4 - TCG Opal Encryption 2, NVM Express (NVMe) |
|---|
| AUDIO & VIDEO | ASUS VivoBook 15 (X1504ZA) | Lenovo ThinkPad X13 Gen 4 (21EX) |
|---|
| Graphics Processor (GPU) | Intel Iris Xe Graphics | Intel Iris Xe Graphics |
|---|---|---|
| Max Monitors Supported | - | 3 external monitor(s) |
| Video System Features | Functions as Intel UHD graphics (for single-channel memory) | Functions as Intel UHD graphics (for single-channel memory) |
| Camera | Yes - 720p | Yes - 1080p |
| Camera Features | Privacy shutter, ASUS 3D Noise Reduction (3DNR) Technology | Privacy shutter, fixed focus |
| Sound | Dual speakers, array microphone | Stereo speakers, dual array microphone |
| Codec | - | Realtek ALC3287 |
| Compliant Standards | - | High Definition Audio, Dolby Audio |
| Audio Features | Output: ASUS SonicMaster, Audio by Dirac, Asus Audio Booster; Input: AI noise cancelling | Input: Dolby Voice, 360° far-field |
| COMMUNICATIONS | ASUS VivoBook 15 (X1504ZA) | Lenovo ThinkPad X13 Gen 4 (21EX) |
|---|
| Wireless | 802.11a/b/g/n/ac/ax (Wi-Fi 6E), Bluetooth 5.3 | Bluetooth 5.1, 802.11a/b/g/n/ac/ax (Wi-Fi 6E) |
|---|---|---|
| Wireless Controller | - | Intel Wi-Fi 6E AX 211 |
| Features | Single stream (1x1) | Dual stream (2x2) |
| WWAN |
|---|
| Generation | - | 4G upgradable |
|---|
| BATTERY | ASUS VivoBook 15 (X1504ZA) | Lenovo ThinkPad X13 Gen 4 (21EX) |
|---|
| Technology | 3-cell Lithium Ion | Lithium polymer |
|---|---|---|
| Battery Capacity (Size) | 42 Wh | 54.7 Wh |
| AC ADAPTER | ASUS VivoBook 15 (X1504ZA) | Lenovo ThinkPad X13 Gen 4 (21EX) |
|---|
| Input | AC 100-240 V (50/60 Hz) | AC 100-240 V (50/60 Hz) |
|---|---|---|
| Output | 45 Watt, 19 V, 2.37 A | 65 Watt |
| INPUT | ASUS VivoBook 15 (X1504ZA) | Lenovo ThinkPad X13 Gen 4 (21EX) |
|---|
| Type | Keyboard, touchpad | Keyboard, TrackPoint, UltraNav |
|---|---|---|
| Numeric Keypad | Yes | - |
| Keyboard Backlight | Yes | Yes |
| Features | Precision touchpad, chiclet keyboard, 1.4mm travel distance | Spill-resistant, multi-touch touchpad, Fn keys with Unified Communications controls |
| CONNECTIONS & EXPANSIONS | ASUS VivoBook 15 (X1504ZA) | Lenovo ThinkPad X13 Gen 4 (21EX) |
|---|
| Interfaces | 2 x USB 3.2 Gen 1 USB-C 3.2 Gen 1 USB 2.0 HDMI 1.4 |
USB 3.2 Gen 1 (Always On) USB 3.2 Gen 1 2 x USB4 (supports Thunderbolt 4, DisplayPort 2.0 Alt Mode) (Power Delivery 3.0) HDMI 2.1 (4K support) Headphone/microphone combo jack |
|---|
| SOFTWARE | ASUS VivoBook 15 (X1504ZA) | Lenovo ThinkPad X13 Gen 4 (21EX) |
|---|
| Operating System (OS) | Windows 11 Home | Windows 11 Pro - English |
|---|---|---|
| Software Included | MyASUS, ScreenXpert, Microsoft 365 (1 month trial), GlideX | Glance by Mirametrix, Intel Connectivity Performance Suite |
| MISCELLANEOUS | ASUS VivoBook 15 (X1504ZA) | Lenovo ThinkPad X13 Gen 4 (21EX) |
|---|
| Included Accessories | Power adapter | USB-C slim power adapter |
|---|---|---|
| Security | Firmware Trusted Platform Module (TPM) Security Chip | Discrete Trusted Platform Module (TPM 2.0) Security Chip, fingerprint reader, smart card reader |
| Security Slot Type | - | Kensington nano security slot |
| Theft/Intrusion Protection | - | Security lock slot (cable lock sold separately) |
| Features | MIL-STD-810H tested, BIOS protection, ASUS Antimicrobial Guard Plus | Administrator password, system password, power-on password, RapidCharge, MIL-STD-810H tested, NVMe password, Firmware Resiliency 3.0, certificate based BIOS authentication, FIDO (Fast Identity Online) authentication |
| Compliant Standards | RoHS, REACH, Energy Star 8.0 | RoHS, Energy-using Products (EuP) Lot 6, TCG Certified, Energy-Related Products (ErP) Lot 26, TCO Certified 9.0 |
| Max Operating Temperature | - | 35 °C |
| Min Operating Temperature | - | 5 °C |
| Humidity Range Operating | - | 8 - 95% |
| Manufacturer Warranty | - | Base warranty - 3 years - pick-up and return Base warranty - battery - 1 year Extended warranty - 1 year - on-site - response time: next business day |
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