Oppo A78 vs Redmi K90 Ultra
The Oppo A78 (2023) runs on the MediaTek Dimensity 700, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 37/100 (a 36-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 5000); the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 515,647); the Oppo A78 is noticeably lighter (188g vs 227g).
Profile comparison
Category scores
Oppo A78
Redmi K90 Ultra
What makes Oppo A78 better?
- Lighter: 188g vs 227g
- Better portability (67/100 vs 40/100)
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 515647
- Better Geekbench Single: 3013 vs 690
- Better Geekbench Multi: 9287 vs 1736
- Bigger battery: 8550 vs 5000 mAh
- Faster charging: 100W vs 33W
- Higher refresh rate: 165Hz vs 90Hz
- Higher performance (92/100 vs 40/100)
- Better camera (37/100 vs 18/100)
- Longer battery life (78/100 vs 46/100)
- Better display (94/100 vs 44/100)
Comparison verdict
Comparing the Oppo A78 vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 36 points higher (73/100 vs 37/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 40/100). In the "camera" category, the Redmi K90 Ultra leads (37/100 vs 18/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 46/100). In the "performance" category, the Redmi K90 Ultra significantly outperforms the Oppo A78 (92/100 vs 40/100). In the "display" category, the Redmi K90 Ultra significantly outperforms the Oppo A78 (94/100 vs 44/100). In the "camera" category, the Redmi K90 Ultra notably outperforms the Oppo A78 (37/100 vs 18/100). In the "battery" category, the Redmi K90 Ultra significantly outperforms the Oppo A78 (78/100 vs 46/100). In the "portability" category, the Oppo A78 notably outperforms the Redmi K90 Ultra (67/100 vs 40/100).
Specs comparison
| Specification | Oppo A78 | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | MediaTek Dimensity 700 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 515647 | 3233695 | |
| Geekbench Single | 690 | 3013 | |
| Geekbench Multi | 1736 | 9287 | |
| Display | 6.6" IPS LCD | 6.8" AMOLED | |
| Resolution | 720x1612 | 1280x2772 | |
| Refresh rate | 90 Hz | 165 Hz | |
| Battery | 5000 mAh | 8550 mAh | |
| Charging | 33W | 100W | |
| DXOMark (camera) | 69 | — | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Front camera | 8 MP | 20 MP | |
| RAM | 8GB | 12GB / 16GB | |
| Storage | 128GB | 256GB / 512GB | |
| OS | Android 12, ColorOS 13 | Android 16 | |
| Brightness (peak) | 600 nits | 3500 nits | |
| NFC | yes | yes | |
| Protection | IP54 | IP68/IP69 | |
| Dimensions | 163.8×75.1×8.0 mm | 162.9×77.9×8.2 mm | |
| Weight | 188 g | 227 g | |
| Launch price | — | $420 |
Camera comparison
Oppo A78
- Main: 50MP f/1.8
- Front: 8MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Display comparison
Oppo A78
- 6.6" IPS LCD
- Resolution: 720x1612
- Refresh rate: 90 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Battery and charging
Oppo A78
- 5000 mAh
- Wired: 33W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Oppo A78 and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Oppo A78 by 84.1% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Oppo A78
Price unknownDetailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Oppo A78 (92/100 vs 40/100).
display
In the "display" category, the Redmi K90 Ultra significantly outperforms the Oppo A78 (94/100 vs 44/100).
camera
In the "camera" category, the Redmi K90 Ultra notably outperforms the Oppo A78 (37/100 vs 18/100).
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the Oppo A78 (78/100 vs 46/100).
portability
In the "portability" category, the Oppo A78 notably outperforms the Redmi K90 Ultra (67/100 vs 40/100).
Frequently asked questions
Which is better: the Oppo A78 or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the Oppo A78 by 36 points (73/100 vs 37/100).
What is the rating of the Oppo A78 and the Redmi K90 Ultra?
The Oppo A78 has a MobileRank rating of 37/100, the Redmi K90 Ultra — 73/100.
Which has the better camera: the Oppo A78 or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on camera score (37/100 vs 18/100).
Which is more powerful: the Oppo A78 or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 40/100).
Should you choose the Oppo A78 over the Redmi K90 Ultra?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.