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 (3,233,695 vs 1,915,524); the Xiaomi 15T is noticeably lighter (194g vs 227g).
Profile comparison
Category scores
Redmi K90 Ultra
Xiaomi 15T
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 1915524
- Better Geekbench Single: 3013 vs 1579
- Better Geekbench Multi: 9287 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)
What makes Xiaomi 15T better?
- Lighter: 194g vs 227g
- Better camera (59/100 vs 37/100)
- Better portability (67/100 vs 40/100)
Comparison verdict
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 — 72/100, Xiaomi 15T — 62/100; 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 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).
Specs comparison
| Specification | Redmi K90 Ultra | Xiaomi 15T | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | MediaTek Dimensity 8400 Ultra | |
| AnTuTu | 3233695 | 1915524 | |
| Geekbench Single | 3013 | 1579 | |
| Geekbench Multi | 9287 | 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 |
Camera comparison
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
Display comparison
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Xiaomi 15T
- 6.8" AMOLED
- Resolution: 2712x1220
- Refresh rate: 120 Hz
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Xiaomi 15T
- 5500 mAh
- Wired: 67W
- No wireless charging
Overall performance score
We compared Redmi K90 Ultra and Xiaomi 15T, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Xiaomi 15T by 68.8% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $29. Redmi K90 Ultra was $29 cheaper at launch.
Detailed category analysis
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).
Frequently asked questions
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. The Xiaomi 15T is a better fit for active users.