In depth comparison and review of ASUS VivoBook 15 (X515FA) and ASUS ZenBook S UX391UA (ET087T). Compare sizes, performance, storage capacities, batteries and other important specifications and features to easily choose the right laptop for you. Our goal is to help you uncover differences between the products and find the laptop that will best fit your needs.
Advantages and disadvantages of ASUS VivoBook 15 (X515FA) based on its technical characteristics, features, user experience, expert reviews and price level.
affordable price
lightweight design
solid state drive
full hd display
decent processor
average battery life
limited graphics performance
no backlit keyboard
basic audio quality
Advantages and disadvantages of ASUS ZenBook S UX391UA (ET087T) based on its technical characteristics, features, user experience, expert reviews and price level.
affordable price
solid build quality
decent processor performance
ample storage capacity
good keyboard layout
average display quality
no backlit keyboard
limited graphics performance
mediocre battery life
| DESIGN AND DIMENSIONS | ASUS VivoBook 15 (X515FA) | ASUS ZenBook S UX391UA (ET087T) |
|---|
| Product Type | Notebook | Notebook |
|---|---|---|
| Dimensions (WxDxH) | 36.02 cm x 23.49 cm x 1.99 cm | 31.1 cm x 21.3 cm x 1.29 cm |
| Weight | 1.8 kg | 1 kg |
| Case Material | Plastic | - |
| Colour | Transparent silver (LCD cover), transparent silver (top), slate grey (bottom) | Deep dive blue |
| DISPLAY | ASUS VivoBook 15 (X515FA) | ASUS ZenBook S UX391UA (ET087T) |
|---|
| Screen Size (Type) | 15.6" | 13.3" |
|---|---|---|
| LCD Backlight Technology | LED backlight | LED backlight |
| Screen Resolution | 1920 x 1080 (Full HD) | 1920 x 1080 (Full HD) |
| Widescreen | Yes | Yes |
| Image Aspect Ratio | 16:9 | 16:9 |
| Image Brightness | 200 cd/m² | 300 cd/m² |
| Colour Gamut | 45% NTSC | 72% NTSC |
| Features | Anti-glare | Ultra Slim Design, anti-glare, WideView, 178° horizontal and vertical viewing angle |
| PROCESSOR | ASUS VivoBook 15 (X515FA) | ASUS ZenBook S UX391UA (ET087T) |
|---|
| CPU | Intel Core i3 (10th Gen) 10110U / 2.1 GHz | Intel Core i7 (8th Gen) 8550U / 1.8 GHz |
|---|---|---|
| Max Turbo Speed | 4.1 GHz | 4 GHz |
| Number of Cores | Dual-Core | Quad-Core |
| Cache | 4 MB | 8 MB |
| 64-bit Computing | - | Yes |
| Features | Intel Turbo Boost Technology 2.0, Intel Smart Cache | Intel Turbo Boost Technology 2.0 |
| MEMORY | ASUS VivoBook 15 (X515FA) | ASUS ZenBook S UX391UA (ET087T) |
|---|
| RAM | 8 GB (1 x 4 GB + 4 GB (soldered)) | 8 GB (provided memory is soldered) |
|---|---|---|
| RAM Type | DDR4 SDRAM | LPDDR3 SDRAM |
| Speed | - | 2133 MHz |
| Rated Speed | - | 2133 MHz |
| Form Factor | SO-DIMM 260-pin | - |
| Slots Qty | 1 | - |
| Empty Slots | 0 | - |
| STORAGE | ASUS VivoBook 15 (X515FA) | ASUS ZenBook S UX391UA (ET087T) |
|---|
| Main Storage Size (HDD/SSD) | 256 GB SSD M.2 2280 PCIe 3.0 - NVM Express (NVMe) | 256 GB SSD M.2 SATA 6Gb/s |
|---|
| AUDIO & VIDEO | ASUS VivoBook 15 (X515FA) | ASUS ZenBook S UX391UA (ET087T) |
|---|
| Graphics Processor (GPU) | Intel UHD Graphics | Intel UHD Graphics 620 |
|---|---|---|
| Camera | Yes - 720p | Yes - HD |
| Sound | Stereo speakers, microphone | Harman/kardon stereo speakers, array microphone |
| Audio Features | ASUS SonicMaster | ASUS SonicMaster |
| COMMUNICATIONS | ASUS VivoBook 15 (X515FA) | ASUS ZenBook S UX391UA (ET087T) |
|---|
| Wireless | 802.11a/b/g/n/ac, Bluetooth 4.1 | 802.11a/b/g/n/ac, Bluetooth 4.2 |
|---|---|---|
| Features | Single stream (1x1) | - |
| BATTERY | ASUS VivoBook 15 (X515FA) | ASUS ZenBook S UX391UA (ET087T) |
|---|
| Technology | 2-cell Lithium Ion | 4-cell |
|---|---|---|
| Battery Capacity (Size) | 37 Wh | 50 Wh |
| Battery Life | - | Up to 13.5 hours |
| AC ADAPTER | ASUS VivoBook 15 (X515FA) | ASUS ZenBook S UX391UA (ET087T) |
|---|
| Input | AC 100-240 V (50/60 Hz) | AC 120/230 V (50/60 Hz) |
|---|---|---|
| Output | 45 Watt, 19 V, 2.37 A | 65 Watt, 20 V |
| INPUT | ASUS VivoBook 15 (X515FA) | ASUS ZenBook S UX391UA (ET087T) |
|---|
| Type | Keyboard, touchpad | Keyboard, touchpad |
|---|---|---|
| Numeric Keypad | Yes | - |
| Keyboard Backlight | - | Yes |
| Features | Chiclet keyboard, 1.4mm travel distance | - |
| CONNECTIONS & EXPANSIONS | ASUS VivoBook 15 (X515FA) | ASUS ZenBook S UX391UA (ET087T) |
|---|
| Slots | 1 x M.2 (PCI Express 3.0 x4) (0 free) | - |
|---|---|---|
| Interfaces | Headphone/microphone combo jack 2 x USB 2.0 USB 3.2 Gen 1 USB-C 3.2 Gen 1 HDMI |
Headphone/microphone combo jack USB-C 3.1 Gen 1 (Power Delivery/data/video) 2 x USB-C 3.1 Gen 2 (supports Thunderbolt 3) (Power Delivery/data/video) |
| SOFTWARE | ASUS VivoBook 15 (X515FA) | ASUS ZenBook S UX391UA (ET087T) |
|---|
| Operating System (OS) | Windows 11 Home | Windows 10 Home |
|---|
| MISCELLANEOUS | ASUS VivoBook 15 (X515FA) | ASUS ZenBook S UX391UA (ET087T) |
|---|
| Included Accessories | Power adapter | USB-C power adapter |
|---|---|---|
| Security | Firmware Trusted Platform Module (TPM) Security Chip | Firmware Trusted Platform Module (TPM) Security Chip |
| Security Slot Type | Kensington security slot | - |
| Theft/Intrusion Protection | Security lock slot (cable lock sold separately) | - |
| Features | System password, hard drive password | - |
| Repairability Index | 5.9 (out of 10) | - |
| ENERGY STAR Certified | Yes | - |
| Model Number | EJ105W | - |
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