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; launch prices were $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 (3,233,695 vs 1,157,244); the OnePlus 9 is noticeably lighter (192g vs 227g).
Profile comparison
Category scores
OnePlus 9
Redmi K90 Ultra
What makes OnePlus 9 better?
- Lighter: 192g vs 227g
- Better camera (51/100 vs 37/100)
- Better portability (56/100 vs 40/100)
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 1157244
- Better Geekbench Single: 3013 vs 1500
- Better Geekbench Multi: 9287 vs 3537
- Bigger battery: 8550 vs 4500 mAh
- Faster charging: 100W vs 65W
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 165Hz vs 120Hz
- Cheaper at launch: $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)
Comparison verdict
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). Value score: OnePlus 9 — 34/100, Redmi K90 Ultra — 72/100; it shows how far a model sits above or below the usual level for its price, and is not part of the overall rating. 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).
Specs comparison
| Specification | OnePlus 9 | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 888 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 1157244 | 3233695 | |
| Geekbench Single | 1500 | 3013 | |
| Geekbench Multi | 3537 | 9287 | |
| 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 | |
| Launch price | $729 | $420 |
Camera comparison
OnePlus 9
- Main: 48MP f/1.8
- Ultrawide: 50MP
- Front: 16MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Display comparison
OnePlus 9
- 6.5" AMOLED
- Resolution: 2400x1080
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Battery and charging
OnePlus 9
- 4500 mAh
- Wired: 65W
- Wireless: 15W
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared OnePlus 9 and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads OnePlus 9 by 64.2% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $309. Redmi K90 Ultra was $309 cheaper at launch.
Detailed category analysis
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).
Frequently asked questions
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.