Redmi K90 Ultra vs Xiaomi 15T
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Xiaomi 15T (2025) runs on the MediaTek Dimensity 8400 Ultra; launch prices were $420 and $449. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 69/100 (a 4-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 5500); the Redmi K90 Ultra is faster in AnTuTu (3,119,308 vs 1,915,524); the Xiaomi 15T is noticeably lighter (194g vs 227g).
Redmi K90 Ultra
Xiaomi 15T
- Higher AnTuTu: 3119308 vs 1915524
- Better Geekbench Single: 3041 vs 1579
- Better Geekbench Multi: 9494 vs 6100
- Bigger battery: 8550 vs 5500 mAh
- Faster charging: 100W vs 67W
- Higher refresh rate: 165Hz vs 120Hz
- Cheaper at launch: $420 vs $449
- Higher performance (92/100 vs 76/100)
- Longer battery life (78/100 vs 59/100)
- Better display (94/100 vs 83/100)
- Lighter: 194g vs 227g
- Better camera (59/100 vs 37/100)
- Better portability (67/100 vs 40/100)
Comparing the Redmi K90 Ultra vs the Xiaomi 15T, the Redmi K90 Ultra scores 4 points higher (73/100 vs 69/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 76/100). In the "camera" category, the Xiaomi 15T leads (59/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 59/100). Value score: Redmi K90 Ultra — 82/100, Xiaomi 15T — 70/100; it is biased by price level, so it should not be compared directly between devices at different prices. In the "performance" category, the Redmi K90 Ultra notably outperforms the Xiaomi 15T (92/100 vs 76/100). In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 83/100). In the "camera" category, the Xiaomi 15T notably outperforms the Redmi K90 Ultra (59/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra notably outperforms the Xiaomi 15T (78/100 vs 59/100). In the "portability" category, the Xiaomi 15T notably outperforms the Redmi K90 Ultra (67/100 vs 40/100).
| Specification | Redmi K90 Ultra | Xiaomi 15T | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | MediaTek Dimensity 8400 Ultra | |
| AnTuTu | 3119308 | 1915524 | |
| Geekbench Single | 3041 | 1579 | |
| Geekbench Multi | 9494 | 6100 | |
| Display | 6.8" AMOLED | 6.8" AMOLED | |
| Resolution | 1280x2772 | 2712x1220 | |
| Refresh rate | 165 Hz | 120 Hz | |
| Battery | 8550 mAh | 5500 mAh | |
| Charging | 100W | 67W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 8 MP | 12 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 20 MP | 20 MP | |
| RAM | 12GB / 16GB | 12GB | |
| Storage | 256GB / 512GB | 256GB / 512GB | |
| OS | Android 16 | Android 15 | |
| Brightness (peak) | 3500 nits | 3200 nits | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | IP68 | |
| Dimensions | 162.9×77.9×8.2 mm | 163.2×78.0×7.5 mm | |
| Weight | 227 g | 194 g | |
| Launch price | $420 | $449 |
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Xiaomi 15T
- Main: 50MP f/1.6
- Ultrawide: 12MP
- Telephoto: 50MP
- Front: 20MP
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Xiaomi 15T
- 6.8" AMOLED
- Resolution: 2712x1220
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Xiaomi 15T
- 5500 mAh
- Wired: 67W
- No wireless charging
We compared Redmi K90 Ultra and Xiaomi 15T, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Xiaomi 15T by 62.8% in our overall performance rating.
Launch price difference: $29. Redmi K90 Ultra was $29 cheaper at launch.
performance
In the "performance" category, the Redmi K90 Ultra notably outperforms the Xiaomi 15T (92/100 vs 76/100).
display
In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 83/100).
camera
In the "camera" category, the Xiaomi 15T notably outperforms the Redmi K90 Ultra (59/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra notably outperforms the Xiaomi 15T (78/100 vs 59/100).
portability
In the "portability" category, the Xiaomi 15T notably outperforms the Redmi K90 Ultra (67/100 vs 40/100).
Which is better: the Redmi K90 Ultra or the Xiaomi 15T?
The Redmi K90 Ultra edges out the Xiaomi 15T by just 4 points — the two devices are very close in overall level.
What is the rating of the Redmi K90 Ultra and the Xiaomi 15T?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Xiaomi 15T — 69/100.
Which has the better camera: the Redmi K90 Ultra or the Xiaomi 15T?
The Xiaomi 15T leads on camera score (59/100 vs 37/100).
Which is more powerful: the Redmi K90 Ultra or the Xiaomi 15T?
The Redmi K90 Ultra leads on performance (92/100 vs 76/100).
Should you choose the Redmi K90 Ultra over the Xiaomi 15T?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers. The Xiaomi 15T is a better fit for active users.