ASUS ROG Phone 9 vs Redmi K90 Ultra
The ASUS ROG Phone 9 (2025) runs on the Qualcomm Snapdragon 8 Elite, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $999 and $420. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 71/100 (a 2-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 5800); the ASUS ROG Phone 9 is faster in AnTuTu (3,136,217 vs 3,119,308).
ASUS ROG Phone 9
Redmi K90 Ultra
- Higher AnTuTu: 3136217 vs 3119308
- Better Geekbench Single: 3100 vs 3041
- Better Geekbench Multi: 9900 vs 9494
- Higher refresh rate: 185Hz vs 165Hz
- Better camera (42/100 vs 37/100)
- Bigger battery: 8550 vs 5800 mAh
- Faster charging: 100W vs 65W
- Cheaper at launch: $420 vs $999
- Longer battery life (78/100 vs 67/100)
- Better display (94/100 vs 89/100)
- Better portability (40/100 vs 33/100)
- Higher value score: 82/100 vs 54/100
Comparing the ASUS ROG Phone 9 vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 2 points higher (73/100 vs 71/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 67/100). In the "value for money" category, the Redmi K90 Ultra leads (82/100 vs 54/100). In the "performance" category, both devices are on the same level — 92/100. In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 89/100). In the "camera" category, the ASUS ROG Phone 9 is a bit better (42/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra is a bit better (78/100 vs 67/100). In the "portability" category, the Redmi K90 Ultra is a bit better (40/100 vs 33/100). In the "value for money" category, the Redmi K90 Ultra notably outperforms the ASUS ROG Phone 9 (82/100 vs 54/100).
| Specification | ASUS ROG Phone 9 | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 3136217 | 3119308 | |
| Geekbench Single | 3100 | 3041 | |
| Geekbench Multi | 9900 | 9494 | |
| Display | 6.8" LTPO AMOLED | 6.8" AMOLED | |
| Resolution | 2400x1080 | 1280x2772 | |
| Refresh rate | 185 Hz | 165 Hz | |
| Battery | 5800 mAh | 8550 mAh | |
| Charging | 65W | 100W | |
| Wireless charging | 15W | 0W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 13 MP | 8 MP | |
| Front camera | 32 MP | 20 MP | |
| RAM | 12GB / 16GB / 24GB | 12GB / 16GB | |
| Storage | 256GB / 512GB / 1TB | 256GB / 512GB | |
| OS | Android 15 / ROG UI | Android 16 | |
| Brightness (peak) | 2500 nits | 3500 nits | |
| NFC | yes | yes | |
| Protection | IP68 | IP68/IP69 | |
| Dimensions | 163.8×76.8×8.9 mm | 162.9×77.9×8.2 mm | |
| Weight | 227 g | 227 g | |
| Launch price | $999 | $420 |
ASUS ROG Phone 9
- Main: 50MP f/f/1.9
- Ultrawide: 13MP
- Front: 32MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
ASUS ROG Phone 9
- 6.8" LTPO AMOLED
- Resolution: 2400x1080
- Refresh rate: 185 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
ASUS ROG Phone 9
- 5800 mAh
- Wired: 65W
- Wireless: 15W
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
We compared ASUS ROG Phone 9 and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
ASUS ROG Phone 9 leads Redmi K90 Ultra by 0.5% in our overall performance rating.
Launch price difference: $579. Redmi K90 Ultra was $579 cheaper at launch.
performance
In the "performance" category, both devices are on the same level — 92/100.
display
In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 89/100).
camera
In the "camera" category, the ASUS ROG Phone 9 is a bit better (42/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra is a bit better (78/100 vs 67/100).
portability
In the "portability" category, the Redmi K90 Ultra is a bit better (40/100 vs 33/100).
value for money
In the "value for money" category, the Redmi K90 Ultra notably outperforms the ASUS ROG Phone 9 (82/100 vs 54/100).
Which is better: the ASUS ROG Phone 9 or the Redmi K90 Ultra?
The Redmi K90 Ultra edges out the ASUS ROG Phone 9 by just 2 points — the two devices are very close in overall level.
What is the rating of the ASUS ROG Phone 9 and the Redmi K90 Ultra?
The ASUS ROG Phone 9 has a MobileRank rating of 71/100, the Redmi K90 Ultra — 73/100.
Which has the better camera: the ASUS ROG Phone 9 or the Redmi K90 Ultra?
The ASUS ROG Phone 9 leads on camera score (42/100 vs 37/100).
Should you choose the ASUS ROG Phone 9 over the Redmi K90 Ultra?
The ASUS ROG Phone 9 is a better fit for gamers and power users. The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.