OnePlus 9 vs Redmi K90 Ultra
The OnePlus 9 (2021) runs on the Qualcomm Snapdragon 888, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite; estimated prices are $729 and $420. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 60/100 (a 13-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 4500); the main camera is 48 MP vs 50 MP; the Redmi K90 Ultra is faster in AnTuTu (3,119,308 vs 1,135,878); the OnePlus 9 is noticeably lighter (192g vs 227g).
OnePlus 9
Redmi K90 Ultra
- Lighter: 192g vs 227g
- Better camera (51/100 vs 37/100)
- Better portability (56/100 vs 40/100)
- Higher AnTuTu: 3119308 vs 1135878
- Better Geekbench Single: 3041 vs 1488
- Better Geekbench Multi: 9494 vs 3373
- Bigger battery: 8550 vs 4500 mAh
- Faster charging: 100W vs 65W
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 165Hz vs 120Hz
- Cheaper: $420 vs $729
- Higher performance (92/100 vs 64/100)
- Longer battery life (78/100 vs 50/100)
- Better display (94/100 vs 80/100)
Comparing the OnePlus 9 vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 13 points higher (73/100 vs 60/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 64/100). In the "camera" category, the OnePlus 9 leads (51/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 50/100). In the "performance" category, the Redmi K90 Ultra notably outperforms the OnePlus 9 (92/100 vs 64/100). In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 80/100). In the "camera" category, the OnePlus 9 is a bit better (51/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra notably outperforms the OnePlus 9 (78/100 vs 50/100). In the "portability" category, the OnePlus 9 notably outperforms the Redmi K90 Ultra (56/100 vs 40/100).
| Specification | OnePlus 9 | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 888 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 1135878 | 3119308 | |
| Geekbench Single | 1488 | 3041 | |
| Geekbench Multi | 3373 | 9494 | |
| Display | 6.5" AMOLED | 6.8" AMOLED | |
| Resolution | 2400x1080 | 1280x2772 | |
| Refresh rate | 120 Hz | 165 Hz | |
| Battery | 4500 mAh | 8550 mAh | |
| Charging | 65W | 100W | |
| Wireless charging | 15W | 0W | |
| Main camera | 48 MP | 50 MP | |
| Ultrawide | 50 MP | 8 MP | |
| Front camera | 16 MP | 20 MP | |
| RAM | 8GB / 12GB | 12GB / 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB | |
| OS | Android 11 | Android 16 | |
| Brightness (peak) | 1100 nits | 3500 nits | |
| NFC | yes | yes | |
| Protection | — | IP68/IP69 | |
| Dimensions | 160.0×74.2×8.7 mm | 162.9×77.9×8.2 mm | |
| Weight | 192 g | 227 g | |
| Price | $729 | $420 |
OnePlus 9
- Main: 48MP f/1.8
- Ultrawide: 50MP
- Front: 16MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
OnePlus 9
- 6.5" AMOLED
- Resolution: 2400x1080
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
OnePlus 9
- 4500 mAh
- Wired: 65W
- Wireless: 15W
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
We compared OnePlus 9 and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads OnePlus 9 by 63.6% in our overall performance rating.
Price difference: $309. Redmi K90 Ultra is cheaper by $309.
performance
In the "performance" category, the Redmi K90 Ultra notably outperforms the OnePlus 9 (92/100 vs 64/100).
display
In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 80/100).
camera
In the "camera" category, the OnePlus 9 is a bit better (51/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra notably outperforms the OnePlus 9 (78/100 vs 50/100).
portability
In the "portability" category, the OnePlus 9 notably outperforms the Redmi K90 Ultra (56/100 vs 40/100).
Which is better: the OnePlus 9 or the Redmi K90 Ultra?
The Redmi K90 Ultra is noticeably better than the OnePlus 9 — the overall rating gap is 13 points.
What is the rating of the OnePlus 9 and the Redmi K90 Ultra?
The OnePlus 9 has a MobileRank rating of 60/100, the Redmi K90 Ultra — 73/100.
Which has the better camera: the OnePlus 9 or the Redmi K90 Ultra?
The OnePlus 9 leads on camera score (51/100 vs 37/100).
Which is more powerful: the OnePlus 9 or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 64/100).
Should you choose the OnePlus 9 over the Redmi K90 Ultra?
The OnePlus 9 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.