| Attribute |
ASUS VivoBook S431FA-EB040T (S431FA-EB040T) × | 
ASUS ZenBook UX331UAL-EG013T (UX331UAL-EG013T) × |
| General | | |
| Model | ASUS VivoBook S431FA-EB040T | ASUS ZenBook UX331UAL-EG013T |
| Product code | S431FA-EB040T | UX331UAL-EG013T |
| Design | | |
| Product colour | Grey, Metallic | Blue |
| Form factor | Clamshell | Clamshell |
| Brand | ASUS | ASUS |
| Family | VivoBook | ZenBook |
| Series | S14 | 13 |
| Model name | S431FA-EB040T | UX331UAL-EG013T |
| Part number | S431FA-EB040T | UX331UAL-EG013T |
| Release year (year) | 2019 | 2019 |
| Processor | | |
| Processor manufacturer | Intel | - |
| Processor family | 8th gen Intel Core i7 | 8th gen Intel Core i7 |
| Processor frequency (GHz) | 1.8 | 1.8 |
| Processor boost frequency (GHz) | 4.6 | 4 |
| Processor model | i7-8565U | i7-8550U |
| Processor cores | 4 | 4 |
| Processor threads | 8 | 8 |
| Processor lithography (Nm) | 14 | 14 |
| Processor socket | BGA 1528 | BGA 1356 |
| Processor cache (MB) | 8 | 8 |
| Memory | | |
| Internal memory type | LPDDR3-SDRAM | LPDDR3-SDRAM |
| Maximum internal memory (GB) | 8 | 8 |
| Memory clock speed (MHz) | 2,133 | 2,133 |
| Internal memory (GB) | 8 | 8 |
| Display | | |
| Display diagonal (inch) | 14 | 13.3 |
| HD type | Full HD | Full HD |
| LED backlight | + | + |
| Dual-screen | - | - |
| Display resolution | 1920 x 1080 pixels | 1920 x 1080 pixels |
| Graphics | | |
| On-board graphics adapter | + | + |
| Discrete graphics adapter | - | - |
| On-board graphics adapter base frequency (MHz) | 300 | 300 |
| Maximum on-board graphics adapter memory (GB) | 32 | 32 |
| On-board graphics adapter model | Intel UHD Graphics | Intel UHD Graphics 620 |
| Storage | | |
| Total storage capacity (GB) | 512 | 512 |
| Number of SSDs installed | 1 | 1 |
| SSD capacity (GB) | 512 | 512 |
| Card reader integrated | + | + |
| Storage media | SSD | SSD |
| Optical drive | - | - |
| Networking | | |
| Wi-Fi standards | - 802.11a
- 802.11b
- 802.11g
- wi-fi 4 (802.11n)
- wi-fi 5 (802.11ac)
| |
| Bluetooth | + | + |
| Ethernet LAN | - | - |
| Wi-Fi | + | + |
| 4g | - | - |
| 3g | - | - |
| Bluetooth version | 5.0 | 4.2 |
| Ports and interfaces | | |
| USB 3.x Type-A ports | 1 | 2 |
| USB 3.x Type-C ports | 1 | - |
| Combo headphone/mic port | + | + |
| USB 2.0 ports | 1 | - |
| HDMI ports quantity | 1 | 1 |
| Audio | | |
| Built-in microphone | + | + |
| Camera | | |
| Front camera | + | + |
| Front camera HD type | HD | - |
| Keyboard | | |
| Numeric keypad | - | - |
| Pointing device | ScreenPad | Touchpad |
| Software | | |
| Operating system installed | Windows 10 Home | Windows 10 Home |
| Battery | | |
| Battery capacity (watt-hours) (Wh) | 47 | 50 |
| Weight and dimensions | | |
| Weight (kg) | 1.4 | 0.99 |
| Height (mm) | 18 | 13.9 |
| Depth (mm) | 213.7 | 216 |
| Width (mm) | 323.3 | 310 |
| Power | | |
| AC adapter power (W) | 45 | 45 |
| Security | | |
| Trusted platform module (TPM) | - | + |