Oppo Reno4 vs Redmi K90 Ultra
The Oppo Reno4 (2020) runs on the Qualcomm Snapdragon 720G, 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 46/100 (a 27-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 4015); the main camera is 48 MP vs 50 MP; the Redmi K90 Ultra is faster in AnTuTu (3,119,308 vs 514,398); the Redmi K90 Ultra has NFC for contactless payments, the Oppo Reno4 doesn't; the Oppo Reno4 is noticeably lighter (165g vs 227g).
Oppo Reno4
Redmi K90 Ultra
- Lighter: 165g vs 227g
- Better camera (39/100 vs 37/100)
- Better portability (83/100 vs 40/100)
- Higher AnTuTu: 3119308 vs 514398
- Better Geekbench Single: 3041 vs 746
- Better Geekbench Multi: 9494 vs 1762
- Bigger battery: 8550 vs 4015 mAh
- Faster charging: 100W vs 30W
- Better main camera: 50MP vs 48MP
- Higher performance (92/100 vs 41/100)
- Longer battery life (78/100 vs 24/100)
- Better display (94/100 vs 84/100)
Comparing the Oppo Reno4 vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 27 points higher (73/100 vs 46/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 41/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 24/100). In the "performance" category, the Redmi K90 Ultra significantly outperforms the Oppo Reno4 (92/100 vs 41/100). In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 84/100). In the "camera" category, the Oppo Reno4 and the Redmi K90 Ultra are nearly equal (39/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra significantly outperforms the Oppo Reno4 (78/100 vs 24/100). In the "portability" category, the Oppo Reno4 significantly outperforms the Redmi K90 Ultra (83/100 vs 40/100).
| Specification | Oppo Reno4 | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 720G | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 514398 | 3119308 | |
| Geekbench Single | 746 | 3041 | |
| Geekbench Multi | 1762 | 9494 | |
| Display | 6.4" Super AMOLED | 6.8" AMOLED | |
| Resolution | 1080x2400 | 1280x2772 | |
| Refresh rate | — | 165 Hz | |
| Battery | 4015 mAh | 8550 mAh | |
| Charging | 30W | 100W | |
| Main camera | 48 MP | 50 MP | |
| Ultrawide | 8 MP | 8 MP | |
| Front camera | 32 MP | 20 MP | |
| RAM | 8GB | 12GB / 16GB | |
| Storage | 128GB | 256GB / 512GB | |
| OS | Android 10, ColorOS 7.2 | Android 16 | |
| Brightness (peak) | — | 3500 nits | |
| NFC | no | yes | |
| Protection | — | IP68/IP69 | |
| Dimensions | 160.3×73.9×7.7 mm | 162.9×77.9×8.2 mm | |
| Weight | 165 g | 227 g | |
| Launch price | — | $420 |
Oppo Reno4
- Main: 48MP f/f/1.7
- Ultrawide: 8MP
- Front: 32MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Oppo Reno4
- 6.4" Super AMOLED
- Resolution: 1080x2400
- Refresh rate: —
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Oppo Reno4
- 4015 mAh
- Wired: 30W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
We compared Oppo Reno4 and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Oppo Reno4 by 83.5% in our overall performance rating.
Oppo Reno4
Price unknownperformance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Oppo Reno4 (92/100 vs 41/100).
display
In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 84/100).
camera
In the "camera" category, the Oppo Reno4 and the Redmi K90 Ultra are nearly equal (39/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the Oppo Reno4 (78/100 vs 24/100).
portability
In the "portability" category, the Oppo Reno4 significantly outperforms the Redmi K90 Ultra (83/100 vs 40/100).
Which is better: the Oppo Reno4 or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the Oppo Reno4 by 27 points (73/100 vs 46/100).
What is the rating of the Oppo Reno4 and the Redmi K90 Ultra?
The Oppo Reno4 has a MobileRank rating of 46/100, the Redmi K90 Ultra — 73/100.
Which is more powerful: the Oppo Reno4 or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 41/100).
Should you choose the Oppo Reno4 over the Redmi K90 Ultra?
The Oppo Reno4 is a better fit for everyday use. The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.