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; launch prices were $180 and $420. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 46/100 (a 27-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 (3,233,695 vs 476,175); the Redmi 15 is noticeably lighter (195g vs 227g).
Profile comparison
Category scores
Redmi 15
Redmi K90 Ultra
What makes Redmi 15 better?
- Better main camera: 108MP vs 50MP
- Lighter: 195g vs 227g
- Cheaper at launch: $180 vs $420
- Better camera (40/100 vs 37/100)
- Better portability (57/100 vs 40/100)
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 476175
- Better Geekbench Single: 3013 vs 466
- Better Geekbench Multi: 9287 vs 1396
- Bigger battery: 8550 vs 5500 mAh
- Faster charging: 100W vs 33W
- Higher refresh rate: 165Hz vs 120Hz
- Higher performance (92/100 vs 34/100)
- Longer battery life (78/100 vs 52/100)
- Better display (94/100 vs 78/100)
Comparison verdict
Comparing the Redmi 15 vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 27 points higher (73/100 vs 46/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 34/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 52/100). Value score: Redmi 15 — 58/100, Redmi K90 Ultra — 72/100; 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 significantly outperforms the Redmi 15 (92/100 vs 34/100). 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).
Specs comparison
| Specification | Redmi 15 | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 685 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 476175 | 3233695 | |
| Geekbench Single | 466 | 3013 | |
| Geekbench Multi | 1396 | 9287 | |
| 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 | |
| Launch price | $180 | $420 |
Camera comparison
Redmi 15
- Main: 108MP f/1.8
- Front: 13MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Display comparison
Redmi 15
- 6.8" AMOLED
- Resolution: 1080x2340
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Battery and charging
Redmi 15
- 5500 mAh
- Wired: 33W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Redmi 15 and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Redmi 15 by 85.3% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $240. Redmi 15 was $240 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Redmi 15 (92/100 vs 34/100).
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).
Frequently asked questions
Which is better: the Redmi 15 or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the Redmi 15 by 27 points (73/100 vs 46/100).
What is the rating of the Redmi 15 and the Redmi K90 Ultra?
The Redmi 15 has a MobileRank rating of 46/100, 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 34/100).
Should you choose the Redmi 15 over the Redmi K90 Ultra?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.