ASUS ROG Phone 9 Pro vs Vivo Y31 5G
Which one should you buy?
Who leads where?
- DisplayASUS ROG Phone 9 Pro
- PerformanceASUS ROG Phone 9 Pro
- DesignVivo Y31 5G
Wins are counted from the official values in the table below; the BUY / CONSIDER / WAIT call comes from each product's own decision box. We do not predict prices.
The differences in short
Processor: ASUS ROG Phone 9 Pro Snapdragon 8 Elite, Vivo Y31 5G Snapdragon 4 Gen 2. Screen Size: ASUS ROG Phone 9 Pro 6.78", Vivo Y31 5G 6.68". Main Camera is the same on both: 50 MP. Vivo Y31 5G leads on Battery: 6500 mAh against 5800 mAh. ASUS ROG Phone 9 Pro leads on Fast Charging: 65 W against 44 W.
Which one for what you do?
Gaming
ASUS ROG Phone 9 Pro
89% – 58%
Photo / Video
ASUS ROG Phone 9 Pro
72% – 50%
Battery Life
Vivo Y31 5G
68% – 45%
Daily Use
Vivo Y31 5G
74% – 62%
The percentages are Kacbu Match scores: computed from official specifications for that use, with no price in them.
 ASUSASUS ROG Phone 9 ProNo reviews yet |  VivoVivo Y31 5GNo reviews yet | |
|---|---|---|
| Key Differences | ||
| Processor | Snapdragon 8 Elite | Snapdragon 4 Gen 2 |
| Screen Size | 6.78" | 6.68" |
| Main Camera | 50 MP | 50 MP |
| Battery | 5800 mAh | 6500 mAh |
| Fast Charging | 65 W | 44 W |
| Display | ||
| Size | 6.78" | 6.68" |
| Panel | LTPO AMOLED | LCD |
| Resolution | 1080x2400 | 720x1608 |
| Refresh Rate | 185 Hz | 120 Hz |
| Peak Brightness | 2500 nit | No data |
| Performance | ||
| Chipset | Snapdragon 8 Elite | Snapdragon 4 Gen 2 |
| Graphics Processor | Adreno 830 | No data |
| RAM | 16 GB | 8 GB |
| Storage | 512 GB | 256 GB |
| Storage type | UFS 4.0 | LPDDR4X + UFS 3.1 |
| Manufacturing Technology | 3 nm | 4 nm |
| Camera | ||
| Main Camera | 50 MP | 50 MP |
| Main Aperture | f/1.9 | f/1.8 |
| Ultra Wide | 13 MP | No data |
| Telephoto | 3x | No data |
| Telephoto Resolution | 32 MP | No data |
| Front Camera | 32 MP | 8 MP |
| Battery and Charging | ||
| Capacity | 5800 mAh | 6500 mAh |
| Wired Charging | 65 W | 44 W |
| Wireless Charging | 15 W | No data |
| Wireless Charging Support | Yes | No data |
| Design | ||
| Weight | 227 g | 209 g |
| Thickness | 8.9 mm | 8.39 mm |
| Frame | Aluminum | No data |
| Back Surface | Glass (programmable mini-LED matrix) | Composite plastic |
| Connectivity | ||
| 5G | Yes | Yes |
| SIM | Dual SIM | Dual Nano-SIM |
| Wi-Fi | Wi-Fi 7 | No data |
| Bluetooth | 5.4 | 5.1 |
| NFC | Yes | Yes |
| Durability and security | ||
| IP Certification | IP68/IP69K | IP68/IP69 |
| Biometrics | Optical In-Display Fingerprint | Side-mounted fingerprint |
| Software | ||
| Operating System | Android | No data |
| Version | Android 15 | Android 15 |
| Interface | No data | Funtouch OS 15 |
| Update Promise | 2 major OS updates | No data |
| Multimedia and ports | ||
| Speaker | Stereo | No data |
| Headphone jack | Yes (3.5mm) | No data |
| USB | Dual USB Type-C (Side + Bottom, DisplayPort Supported) | USB 2.0 |
ASUS ROG Phone 9 Pro leads on 6 of 10 compared specs.
This table is based on manufacturers official specifications. Winning on paper does not always mean a difference in everyday use.