Redmi K90 vs Xiaomi 15 Ultra
The Redmi K90 (2025) runs on the Qualcomm Snapdragon 8 Elite, while the Xiaomi 15 Ultra (2025) runs on the Qualcomm Snapdragon 8 Elite; estimated prices are $401 and $999. By overall MobileRank rating, the Xiaomi 15 Ultra leads — 85/100 vs 76/100 (a 9-point difference). Key differences: the Redmi K90 has the bigger battery (7100 mAh vs 6000); the Redmi K90 is faster in AnTuTu (3,088,357 vs 3,030,376); the Redmi K90 is noticeably lighter (206g vs 225g).
Redmi K90
Xiaomi 15 Ultra
- Higher AnTuTu: 3088357 vs 3030376
- Bigger battery: 7100 vs 6000 mAh
- Faster charging: 100W vs 90W
- Lighter: 206g vs 225g
- Cheaper: $401 vs $999
- Better portability (55/100 vs 29/100)
- Better value for money (90/100 vs 82/100)
- Better Geekbench Single: 3050 vs 3041
- Better Geekbench Multi: 10200 vs 9494
- Better camera (87/100 vs 58/100)
- Longer battery life (80/100 vs 72/100)
- Better display (90/100 vs 82/100)
Comparing the Redmi K90 vs the Xiaomi 15 Ultra, the Xiaomi 15 Ultra scores 9 points higher (85/100 vs 76/100). In the "camera" category, the Xiaomi 15 Ultra leads (87/100 vs 58/100). In the "performance" category, both devices are on the same level — 92/100. In the "display" category, the Xiaomi 15 Ultra is a bit better (90/100 vs 82/100). In the "camera" category, the Xiaomi 15 Ultra notably outperforms the Redmi K90 (87/100 vs 58/100). In the "battery" category, the Xiaomi 15 Ultra is a bit better (80/100 vs 72/100). In the "portability" category, the Redmi K90 notably outperforms the Xiaomi 15 Ultra (55/100 vs 29/100). In the "value for money" category, the Redmi K90 is a bit better (90/100 vs 82/100).
| Specification | Redmi K90 | Xiaomi 15 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 3088357 | 3030376 | |
| Geekbench Single | 3041 | 3050 | |
| Geekbench Multi | 9494 | 10200 | |
| Display | 6.6" AMOLED | 6.7" LTPO AMOLED | |
| Resolution | 2510x1156 | 3200x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 7100 mAh | 6000 mAh | |
| Charging | 100W | 90W | |
| Wireless charging | 0W | 50W | |
| DXOMark (camera) | — | 159 | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 8 MP | 50 MP | |
| Telephoto | 50 MP | 50 MP | |
| Front camera | 20 MP | 32 MP | |
| RAM | 12GB / 16GB | 16GB | |
| Storage | 256GB / 512GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 15 / HyperOS 2 | |
| Brightness (peak) | 3500 nits | 3200 nits | |
| NFC | yes | yes | |
| Protection | IP68 | IP68 | |
| Dimensions | 157.5×75.3×8.0 mm | 161.3×75.3×9.4 mm | |
| Weight | 206 g | 225 g | |
| Price | $401 | $999 |
Redmi K90
- Main: 50MP f/f/1.9
- Ultrawide: 8MP
- Telephoto: 50MP
- Front: 20MP
Xiaomi 15 Ultra
- Main: 50MP f/f/1.63
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Redmi K90
- 6.6" AMOLED
- Resolution: 2510x1156
- Refresh rate: 120 Hz
Xiaomi 15 Ultra
- 6.7" LTPO AMOLED
- Resolution: 3200x1440
- Refresh rate: 120 Hz
Redmi K90
- 7100 mAh
- Wired: 100W
- No wireless charging
Xiaomi 15 Ultra
- 6000 mAh
- NanoReview test: web browsing 12:19 hrs, total 30:03 hrs
- Wired: 90W
- Wireless: 50W
We compared Redmi K90 and Xiaomi 15 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 leads Xiaomi 15 Ultra by 1.9% in our overall performance rating.
Price difference: $598. Redmi K90 is cheaper by $598.
performance
In the "performance" category, both devices are on the same level — 92/100.
display
In the "display" category, the Xiaomi 15 Ultra is a bit better (90/100 vs 82/100).
camera
In the "camera" category, the Xiaomi 15 Ultra notably outperforms the Redmi K90 (87/100 vs 58/100).
battery
In the "battery" category, the Xiaomi 15 Ultra is a bit better (80/100 vs 72/100).
portability
In the "portability" category, the Redmi K90 notably outperforms the Xiaomi 15 Ultra (55/100 vs 29/100).
value for money
In the "value for money" category, the Redmi K90 is a bit better (90/100 vs 82/100).
Which is better: the Redmi K90 or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra edges out the Redmi K90 by just 9 points — the two devices are very close in overall level.
What is the rating of the Redmi K90 and the Xiaomi 15 Ultra?
The Redmi K90 has a MobileRank rating of 76/100, the Xiaomi 15 Ultra — 85/100.
Which has the better camera: the Redmi K90 or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra leads on camera score (87/100 vs 58/100).
Should you choose the Redmi K90 over the Xiaomi 15 Ultra?
The Redmi K90 is a better fit for gamers and power users, budget-conscious buyers. The Xiaomi 15 Ultra is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life, budget-conscious buyers.