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; launch prices were $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 (3,077,585 vs 3,030,376); the Redmi K90 is noticeably lighter (206g vs 225g).
Profile comparison
Category scores
Redmi K90
Xiaomi 15 Ultra
What makes Redmi K90 better?
- Higher AnTuTu: 3077585 vs 3030376
- Bigger battery: 7100 vs 6000 mAh
- Faster charging: 100W vs 90W
- Lighter: 206g vs 225g
- Cheaper at launch: $401 vs $999
- Better portability (55/100 vs 29/100)
What makes Xiaomi 15 Ultra better?
- Better Geekbench Single: 3050 vs 3013
- Better Geekbench Multi: 10200 vs 9287
- Higher performance (92/100 vs 91/100)
- Better camera (87/100 vs 58/100)
- Longer battery life (80/100 vs 72/100)
- Better display (90/100 vs 82/100)
Comparison verdict
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). Value score: Redmi K90 — 80/100, Xiaomi 15 Ultra — 80/100; 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 Xiaomi 15 Ultra and the Redmi K90 are nearly equal (92/100 vs 91/100). 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).
Specs comparison
| Specification | Redmi K90 | Xiaomi 15 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 3077585 | 3030376 | |
| Geekbench Single | 3013 | 3050 | |
| Geekbench Multi | 9287 | 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 | |
| Launch price | $401 | $999 |
Camera comparison
Redmi K90
- Main: 50MP f/1.9
- Ultrawide: 8MP
- Telephoto: 50MP
- Front: 20MP
Xiaomi 15 Ultra
- Main: 50MP f/1.63
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Display comparison
Redmi K90
- 6.6" AMOLED
- Resolution: 2510x1156
- Refresh rate: 120 Hz
Xiaomi 15 Ultra
- 6.7" LTPO AMOLED
- Resolution: 3200x1440
- Refresh rate: 120 Hz
Battery and charging
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
Overall performance score
We compared Redmi K90 and Xiaomi 15 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 leads Xiaomi 15 Ultra by 1.6% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $598. Redmi K90 was $598 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Xiaomi 15 Ultra and the Redmi K90 are nearly equal (92/100 vs 91/100).
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).
Frequently asked questions
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.