OPPO A78 5G vs vivo Y31 5G
23.2Performance20
35.2Display39.6
29Camera29
47.8Battery66.2
60Features73.3
6 spec wins — OPPO A78 5G4 spec wins — vivo Y31 5G
InnoReviews verdict
vivo Y31 5G wins this phone face-off, 40.3 to 35.4, pulling ahead mainly in battery (+18) and features (+13). OPPO A78 5G still makes sense if its price or standout specs fit your needs better.
Which would you pick?
Key differences
Reasons to pick the OPPO A78 5G
- Stronger performance score: 23 vs 20
- 33% higher RAM (max): 8 GB vs 6 GB
- 10% lower weight: 188 g vs 209 g
- Has NFC — the other doesn't
- Has 3.5mm jack — the other doesn't
Reasons to pick the vivo Y31 5G
- Stronger display score: 40 vs 35
- Stronger battery score: 66 vs 48
- Stronger features score: 73 vs 60
- 33% higher Refresh rate: 120 Hz vs 90 Hz
- 33% higher Wired charging: 44 W vs 33 W
Display
| Spec | OPPO A78 5G | vivo Y31 5G |
|---|---|---|
| Screen size | 6.56 ″ | 6.68 ″+2% |
| Panel type | IPS LCD | IPS LCD |
| Resolution | 1612x720 | 720x1608 |
| Pixel density | 269 ppi+2% | 264 ppi |
| Refresh rate | 90 Hz | 120 Hz+33% |
| Peak brightness | — | 1,000 nits |
Performance
| Spec | OPPO A78 5G | vivo Y31 5G |
|---|---|---|
| Chipset | MediaTek Dimensity 700 | Qualcomm Snapdragon 4 Gen 2 |
| AnTuTu | 360,000 | — |
| Geekbench 6 (single) | 730Bottom 13% | — |
| Geekbench 6 (multi) | 1,900Bottom 12% | — |
| RAM (max) | 8 GB+33% | 6 GB |
| Storage options | 128GB | 128GB |
| Storage type | UFS 2.2 | eMMC 5.1 |
Camera
| Spec | OPPO A78 5G | vivo Y31 5G |
|---|---|---|
| Main camera | 50 MP | 50 MP |
| Main aperture | f/1.8 | f/1.8 |
| Max video | 1080p@30fps | 1080p@30fps |
| Front camera | 8 MP | 8 MP |
| OIS | No | No |
Battery
| Spec | OPPO A78 5G | vivo Y31 5G |
|---|---|---|
| Capacity | 5,000 mAh | 6,500 mAh+30% |
| Wired charging | 33 W | 44 W+33% |
Design
| Spec | OPPO A78 5G | vivo Y31 5G |
|---|---|---|
| Weight | 188 g+10% | 209 g |
| Thickness | 8 mm+5% | 8.4 mm |
| IP rating | IP54 | IP68/IP69 |
| Frame material | Plastic | — |
Connectivity
| Spec | OPPO A78 5G | vivo Y31 5G |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 5 | Wi-Fi 5 |
| Bluetooth | 5.3 | 4.2 |
| NFC | Yes | No |
| USB | USB-C 2.0 | USB-C 2.0 |
| eSIM | No | No |
Software
| Spec | OPPO A78 5G | vivo Y31 5G |
|---|---|---|
| OS at launch | Android 13 (ColorOS 13) | Android 15 (Funtouch OS 15) |
| OS update pledge | 2 years | — |
Audio
| Spec | OPPO A78 5G | vivo Y31 5G |
|---|---|---|
| Stereo speakers | Yes | Yes |
| 3.5mm jack | Yes | No |