| Attribute |
ASUS ZenBook UX331FN-EM052T (90NB0KE2-M01420) × | 
ASUS UX391FA-XH74T (90NB0L72-M02310) × |
| General | | |
| Model | ASUS ZenBook UX331FN-EM052T | ASUS UX391FA-XH74T |
| Product code | 90NB0KE2-M01420 | 90NB0L72-M02310 |
| Design | | |
| Product colour | Grey | Blue |
| Form factor | Clamshell | Clamshell |
| Brand | ASUS | ASUS |
| Family | ZenBook | - |
| Series | 13 | - |
| Model name | UX331FN-EM052T | UX391FA-XH74T |
| Part number | 90NB0KE2-M01420 | 90NB0L72-M02310 |
| Release year (year) | 2020 | 2020 |
| Processor | | |
| Processor manufacturer | Intel | Intel |
| Processor family | 8th gen Intel Core i5 | 8th gen Intel Core i7 |
| Processor frequency (GHz) | 1.6 | 1.8 |
| Processor boost frequency (GHz) | 3.9 | 4.6 |
| Processor model | i5-8265U | i7-8565U |
| Processor cores | 4 | 4 |
| Processor threads | 8 | 8 |
| Processor lithography (Nm) | 14 | 14 |
| Processor socket | BGA 1528 | BGA 1528 |
| Processor cache (MB) | 6 | 8 |
| Memory | | |
| Internal memory type | DDR3L-SDRAM | LPDDR3-SDRAM |
| Memory clock speed (MHz) | 2,133 | 2,133 |
| Internal memory (GB) | 8 | 16 |
| Display | | |
| Display diagonal (inch) | 13.3 | 13.3 |
| Panel type | IPS | - |
| HD type | Full HD | 4K Ultra HD |
| LED backlight | + | + |
| Touchscreen | - | + |
| Display resolution | 1920 x 1080 pixels | 3840 x 2160 pixels |
| Graphics | | |
| On-board graphics adapter | + | + |
| Discrete graphics adapter model | NVIDIA GeForce MX150 | - |
| Discrete graphics memory type | GDDR5 | - |
| Discrete graphics adapter | + | - |
| Discrete graphics adapter memory (GB) | 2 | - |
| 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 |
| 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 | | |
| Bluetooth | + | + |
| Ethernet LAN | - | - |
| Bluetooth version | 4.2 | 5.0 |
| Ports and interfaces | | |
| USB 3.x Type-A ports | 2 | 1 |
| USB 3.x Type-C ports | 1 | 2 |
| HDMI ports quantity | 1 | - |
| Audio | | |
| Speaker power (W) | 1 | - |
| Built-in microphone | + | - |
| Camera | | |
| Front camera | + | + |
| Front camera HD type | - | HD |
| Keyboard | | |
| Numeric keypad | - | - |
| Full-size keyboard | - | + |
| Pointing device | Touchpad | Touchpad |
| Software | | |
| Operating system installed | Windows 10 | Windows 10 Home |
| Operating system architecture (bit) | 64 | 64 |
| Battery | | |
| Battery capacity (watt-hours) (Wh) | 50 | 50 |
| Weight and dimensions | | |
| Weight (kg) | 1.21 | - |
| Height (mm) | 13.9 | 12.9 |
| Depth (mm) | 216 | 213 |
| Width (mm) | 310 | 311 |
| Power | | |
| AC adapter power (W) | 65 | 65 |
| Security | | |
| Fingerprint reader | + | + |