Redmi 15 vs Redmi K90 Ultra
The Redmi 15 (2026) runs on the Qualcomm Snapdragon 685, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite; estimated prices are $156 and $420. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 45/100 (a 28-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 5500); the main camera is 108 MP vs 50 MP; the Redmi K90 Ultra is faster in AnTuTu (3,119,308 vs 467,392); the Redmi 15 is noticeably lighter (195g vs 227g).
Redmi 15
Redmi K90 Ultra
- Better main camera: 108MP vs 50MP
- Lighter: 195g vs 227g
- Cheaper: $156 vs $420
- Better camera (40/100 vs 37/100)
- Better portability (57/100 vs 40/100)
- Higher AnTuTu: 3119308 vs 467392
- Better Geekbench Single: 3041 vs 466
- Better Geekbench Multi: 9494 vs 1396
- Bigger battery: 8550 vs 5500 mAh
- Faster charging: 100W vs 33W
- Higher refresh rate: 165Hz vs 120Hz
- Higher performance (92/100 vs 33/100)
- Longer battery life (78/100 vs 52/100)
- Better display (94/100 vs 78/100)
Comparing the Redmi 15 vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 28 points higher (73/100 vs 45/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 33/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 52/100). In the "performance" category, the Redmi K90 Ultra significantly outperforms the Redmi 15 (92/100 vs 33/100). In the "display" category, the Redmi K90 Ultra notably outperforms the Redmi 15 (94/100 vs 78/100). In the "camera" category, the Redmi 15 and the Redmi K90 Ultra are nearly equal (40/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra notably outperforms the Redmi 15 (78/100 vs 52/100). In the "portability" category, the Redmi 15 notably outperforms the Redmi K90 Ultra (57/100 vs 40/100).
| Specification | Redmi 15 | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 685 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 467392 | 3119308 | |
| Geekbench Single | 466 | 3041 | |
| Geekbench Multi | 1396 | 9494 | |
| Display | 6.8" AMOLED | 6.8" AMOLED | |
| Resolution | 1080x2340 | 1280x2772 | |
| Refresh rate | 120 Hz | 165 Hz | |
| Battery | 5500 mAh | 8550 mAh | |
| Charging | 33W | 100W | |
| Main camera | 108 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Front camera | 13 MP | 20 MP | |
| RAM | 6GB / 8GB | 12GB / 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB | |
| OS | Android 15, HyperOS 2.2 | Android 16 | |
| Brightness (peak) | 850 nits | 3500 nits | |
| NFC | yes | yes | |
| Protection | IP64 | IP68/IP69 | |
| Dimensions | 169.5×80.5×8.4 mm | 162.9×77.9×8.2 mm | |
| Weight | 195 g | 227 g | |
| Price | $156 | $420 |
Redmi 15
- Main: 108MP
- Front: 13MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Redmi 15
- 6.8" AMOLED
- Resolution: 1080x2340
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Redmi 15
- 5500 mAh
- Wired: 33W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
We compared Redmi 15 and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Redmi 15 by 85.0% in our overall performance rating.
Price difference: $264. Redmi 15 is cheaper by $264.
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Redmi 15 (92/100 vs 33/100).
display
In the "display" category, the Redmi K90 Ultra notably outperforms the Redmi 15 (94/100 vs 78/100).
camera
In the "camera" category, the Redmi 15 and the Redmi K90 Ultra are nearly equal (40/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra notably outperforms the Redmi 15 (78/100 vs 52/100).
portability
In the "portability" category, the Redmi 15 notably outperforms the Redmi K90 Ultra (57/100 vs 40/100).
Which is better: the Redmi 15 or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the Redmi 15 by 28 points (73/100 vs 45/100).
What is the rating of the Redmi 15 and the Redmi K90 Ultra?
The Redmi 15 has a MobileRank rating of 45/100, the Redmi K90 Ultra — 73/100.
Which is more powerful: the Redmi 15 or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 33/100).
Should you choose the Redmi 15 over the Redmi K90 Ultra?
The Redmi 15 is a better fit for everyday use. The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.