Category Breakdown
Camera
≈ Tie
Main sensor resolution
≈ TieBattery
Y31 Pro
Battery capacity (6,500 mAh)
WinsCharging
≈ Tie
Wired charging speed
≈ TiePerformance
—
AnTuTu benchmark
—Display
iQOO Z9s
Screen size (6.77")
WinsWeight
iQOO Z9s
Total weight (180g)
WinsValue
iQOO Z9s
Specs-per-dollar (server score) (9.1/10)
WinsFull Spec Comparison
| Spec | iQOO Z9s | Y31 Pro |
|---|---|---|
Display | ||
| 6.77" | 6.72" | |
| 1,080 × 2,392 | 1,080 × 2,408 | |
| AMOLED | IPS LCD | |
| 120Hz | 120Hz | |
| 1,800 nits | — | |
Camera | ||
| 50 MP | 50 MP | |
| Dual | Dual | |
| Yes | No | |
| Fingerprint (under display, Fingerprint (under display, optical), accelerometer, compass, gyro, optical), proximity | Fingerprint (side-mounted), accelerometer, compass, gyro, proximity | |
Performance | ||
| Mediatek Dimensity 7300 (4 nm) | Mediatek Dimensity 7300 (4 nm) | |
| 12 GB | 8 GB | |
| 256 GB | 256 GB | |
Battery | ||
| 5,500 mAh | 6,500 mAh | |
| 44W | 44W | |
| No | No | |
Build | ||
| 180g | 204g | |
| 7.5mm | 8.1mm | |
| — | Glass front, plastic back, plastic frame | |
| Budget | Budget | |
Who Each Phone Is Really For
If your priorities differ from the verdict above, start here.
Best overall value
vivo iQOO Z9s
Highest value score — most specs per dollar.
Budget pick
vivo Y31 Pro
Lowest price while still competitive.
Photography
vivo Y31 Pro
Highest resolution main camera.