Oppo A78 4G vs Redmi K90
The Oppo A78 4G (2023) runs on the Qualcomm Snapdragon 680 4G, while the Redmi K90 (2025) runs on the Qualcomm Snapdragon 8 Elite. By overall MobileRank rating, the Redmi K90 leads — 76/100 vs 42/100 (a 34-point difference). Key differences: the Redmi K90 has the bigger battery (7100 mAh vs 5000); the Redmi K90 is faster in AnTuTu (3,077,585 vs 424,216); the Oppo A78 4G is noticeably lighter (180g vs 206g).
Profile comparison
Category scores
Oppo A78 4G
Redmi K90
What makes Oppo A78 4G better?
- Lighter: 180g vs 206g
- Better portability (72/100 vs 55/100)
What makes Redmi K90 better?
- Higher AnTuTu: 3077585 vs 424216
- Better Geekbench Single: 3013 vs 412
- Better Geekbench Multi: 9287 vs 1423
- Bigger battery: 7100 vs 5000 mAh
- Faster charging: 100W vs 67W
- Higher refresh rate: 120Hz vs 90Hz
- Higher performance (91/100 vs 31/100)
- Better camera (58/100 vs 30/100)
- Longer battery life (72/100 vs 53/100)
- Better display (82/100 vs 69/100)
Comparison verdict
Comparing the Oppo A78 4G vs the Redmi K90, the Redmi K90 scores 34 points higher (76/100 vs 42/100). In the "performance" category, the Redmi K90 leads (91/100 vs 31/100). In the "camera" category, the Redmi K90 leads (58/100 vs 30/100). In the "battery" category, the Redmi K90 leads (72/100 vs 53/100). In the "performance" category, the Redmi K90 significantly outperforms the Oppo A78 4G (91/100 vs 31/100). In the "display" category, the Redmi K90 is a bit better (82/100 vs 69/100). In the "camera" category, the Redmi K90 notably outperforms the Oppo A78 4G (58/100 vs 30/100). In the "battery" category, the Redmi K90 notably outperforms the Oppo A78 4G (72/100 vs 53/100). In the "portability" category, the Oppo A78 4G notably outperforms the Redmi K90 (72/100 vs 55/100).
Specs comparison
| Specification | Oppo A78 4G | Redmi K90 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 680 4G | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 424216 | 3077585 | |
| Geekbench Single | 412 | 3013 | |
| Geekbench Multi | 1423 | 9287 | |
| Display | 6.4" AMOLED | 6.6" AMOLED | |
| Resolution | 1080x2400 | 2510x1156 | |
| Refresh rate | 90 Hz | 120 Hz | |
| Battery | 5000 mAh | 7100 mAh | |
| Charging | 67W | 100W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 8 MP | 20 MP | |
| RAM | 8GB | 12GB / 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB | |
| OS | Android 13, ColorOS 13.1 | Android 16 | |
| Brightness (peak) | 430 nits | 3500 nits | |
| NFC | yes | yes | |
| Protection | IP54 | IP68 | |
| Dimensions | 160.0×73.2×7.9 mm | 157.5×75.3×8.0 mm | |
| Weight | 180 g | 206 g | |
| Launch price | — | $401 |
Camera comparison
Oppo A78 4G
- Main: 50MP f/1.8
- Front: 8MP
Redmi K90
- Main: 50MP f/1.9
- Ultrawide: 8MP
- Telephoto: 50MP
- Front: 20MP
Display comparison
Oppo A78 4G
- 6.4" AMOLED
- Resolution: 1080x2400
- Refresh rate: 90 Hz
Redmi K90
- 6.6" AMOLED
- Resolution: 2510x1156
- Refresh rate: 120 Hz
Battery and charging
Oppo A78 4G
- 5000 mAh
- Wired: 67W
- No wireless charging
Redmi K90
- 7100 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Oppo A78 4G and Redmi K90, covering their specs and all relevant benchmarks.
Redmi K90 leads Oppo A78 4G by 86.2% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Oppo A78 4G
Price unknownDetailed category analysis
performance
In the "performance" category, the Redmi K90 significantly outperforms the Oppo A78 4G (91/100 vs 31/100).
display
In the "display" category, the Redmi K90 is a bit better (82/100 vs 69/100).
camera
In the "camera" category, the Redmi K90 notably outperforms the Oppo A78 4G (58/100 vs 30/100).
battery
In the "battery" category, the Redmi K90 notably outperforms the Oppo A78 4G (72/100 vs 53/100).
portability
In the "portability" category, the Oppo A78 4G notably outperforms the Redmi K90 (72/100 vs 55/100).
Frequently asked questions
Which is better: the Oppo A78 4G or the Redmi K90?
The Redmi K90 significantly outperforms the Oppo A78 4G by 34 points (76/100 vs 42/100).
What is the rating of the Oppo A78 4G and the Redmi K90?
The Oppo A78 4G has a MobileRank rating of 42/100, the Redmi K90 — 76/100.
Which has the better camera: the Oppo A78 4G or the Redmi K90?
The Redmi K90 leads on camera score (58/100 vs 30/100).
Which is more powerful: the Oppo A78 4G or the Redmi K90?
The Redmi K90 leads on performance (91/100 vs 31/100).
Should you choose the Oppo A78 4G over the Redmi K90?
The Redmi K90 is a better fit for gamers and power users, budget-conscious buyers.