OnePlus 8 vs Redmi K90 Ultra
The OnePlus 8 (2020) runs on the Qualcomm Snapdragon 865, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $699 and $420. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 50/100 (a 23-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 4300); the main camera is 48 MP vs 50 MP; the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 1,003,562); the OnePlus 8 is noticeably lighter (180g vs 227g).
OnePlus 8
Redmi K90 Ultra
- Lighter: 180g vs 227g
- Better portability (72/100 vs 40/100)
- Higher AnTuTu: 3233695 vs 1003562
- Better Geekbench Single: 3041 vs 1168
- Better Geekbench Multi: 9494 vs 3431
- Bigger battery: 8550 vs 4300 mAh
- Faster charging: 100W vs 30W
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 165Hz vs 90Hz
- Cheaper at launch: $420 vs $699
- Higher performance (92/100 vs 60/100)
- Longer battery life (78/100 vs 30/100)
- Better display (94/100 vs 68/100)
Comparing the OnePlus 8 vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 23 points higher (73/100 vs 50/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 60/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 30/100). Value score: OnePlus 8 — 12/100, Redmi K90 Ultra — 82/100; it is biased by price level, so it should not be compared directly between devices at different prices. In the "performance" category, the Redmi K90 Ultra significantly outperforms the OnePlus 8 (92/100 vs 60/100). In the "display" category, the Redmi K90 Ultra notably outperforms the OnePlus 8 (94/100 vs 68/100). In the "camera" category, both devices are on the same level — 37/100. In the "battery" category, the Redmi K90 Ultra significantly outperforms the OnePlus 8 (78/100 vs 30/100). In the "portability" category, the OnePlus 8 significantly outperforms the Redmi K90 Ultra (72/100 vs 40/100).
| Specification | OnePlus 8 | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 865 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 1003562 | 3233695 | |
| Geekbench Single | 1168 | 3041 | |
| Geekbench Multi | 3431 | 9494 | |
| Display | 6.5" AMOLED | 6.8" AMOLED | |
| Resolution | 2400x1080 | 1280x2772 | |
| Refresh rate | 90 Hz | 165 Hz | |
| Battery | 4300 mAh | 8550 mAh | |
| Charging | 30W | 100W | |
| Main camera | 48 MP | 50 MP | |
| Ultrawide | 16 MP | 8 MP | |
| Front camera | 16 MP | 20 MP | |
| RAM | 8GB / 12GB | 12GB / 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB | |
| OS | Android 10 | Android 16 | |
| Brightness (peak) | — | 3500 nits | |
| NFC | yes | yes | |
| Protection | IP68 | IP68/IP69 | |
| Dimensions | 160.2×72.9×8.0 mm | 162.9×77.9×8.2 mm | |
| Weight | 180 g | 227 g | |
| Launch price | $699 | $420 |
OnePlus 8
- Main: 48MP f/f/1.75
- Ultrawide: 16MP
- Front: 16MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
OnePlus 8
- 6.5" AMOLED
- Resolution: 2400x1080
- Refresh rate: 90 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
OnePlus 8
- 4300 mAh
- Wired: 30W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
We compared OnePlus 8 and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads OnePlus 8 by 69.0% in our overall performance rating.
Launch price difference: $279. Redmi K90 Ultra was $279 cheaper at launch.
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the OnePlus 8 (92/100 vs 60/100).
display
In the "display" category, the Redmi K90 Ultra notably outperforms the OnePlus 8 (94/100 vs 68/100).
camera
In the "camera" category, both devices are on the same level — 37/100.
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the OnePlus 8 (78/100 vs 30/100).
portability
In the "portability" category, the OnePlus 8 significantly outperforms the Redmi K90 Ultra (72/100 vs 40/100).
Which is better: the OnePlus 8 or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the OnePlus 8 by 23 points (73/100 vs 50/100).
What is the rating of the OnePlus 8 and the Redmi K90 Ultra?
The OnePlus 8 has a MobileRank rating of 50/100, the Redmi K90 Ultra — 73/100.
Which is more powerful: the OnePlus 8 or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 60/100).
Should you choose the OnePlus 8 over the Redmi K90 Ultra?
The OnePlus 8 is a better fit for active users. The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.