Redmi K90 Ultra vs Redmi Note 15 4G
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Redmi Note 15 4G (2025) runs on the MediaTek Helio G100 Ultra. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 51/100 (a 22-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 6000); the main camera is 50 MP vs 108 MP; the Redmi K90 Ultra is faster in AnTuTu (3,119,308 vs 576,015); the Redmi Note 15 4G is noticeably lighter (183g vs 227g).
Redmi K90 Ultra
Redmi Note 15 4G
- Higher AnTuTu: 3119308 vs 576015
- Better Geekbench Single: 3041 vs 727
- Better Geekbench Multi: 9494 vs 2014
- Bigger battery: 8550 vs 6000 mAh
- Faster charging: 100W vs 33W
- Higher refresh rate: 165Hz vs 120Hz
- Higher performance (92/100 vs 44/100)
- Longer battery life (78/100 vs 53/100)
- Better display (94/100 vs 79/100)
- Better main camera: 108MP vs 50MP
- Lighter: 183g vs 227g
- Better camera (42/100 vs 37/100)
- Better portability (70/100 vs 40/100)
Comparing the Redmi K90 Ultra vs the Redmi Note 15 4G, the Redmi K90 Ultra scores 22 points higher (73/100 vs 51/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 44/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 53/100). In the "performance" category, the Redmi K90 Ultra significantly outperforms the Redmi Note 15 4G (92/100 vs 44/100). In the "display" category, the Redmi K90 Ultra notably outperforms the Redmi Note 15 4G (94/100 vs 79/100). In the "camera" category, the Redmi Note 15 4G is a bit better (42/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra notably outperforms the Redmi Note 15 4G (78/100 vs 53/100). In the "portability" category, the Redmi Note 15 4G significantly outperforms the Redmi K90 Ultra (70/100 vs 40/100).
| Specification | Redmi K90 Ultra | Redmi Note 15 4G | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | MediaTek Helio G100 Ultra | |
| AnTuTu | 3119308 | 576015 | |
| Geekbench Single | 3041 | 727 | |
| Geekbench Multi | 9494 | 2014 | |
| Display | 6.8" AMOLED | 6.8" AMOLED | |
| Resolution | 1280x2772 | 1080x2392 | |
| Refresh rate | 165 Hz | 120 Hz | |
| Battery | 8550 mAh | 6000 mAh | |
| Charging | 100W | 33W | |
| Main camera | 50 MP | 108 MP | |
| Ultrawide | 8 MP | 0 MP | |
| Front camera | 20 MP | 20 MP | |
| RAM | 12GB / 16GB | 6GB / 8GB | |
| Storage | 256GB / 512GB | 128GB / 256GB / 512GB | |
| OS | Android 16 | Android 15, up to 4 major Android upgrades, HyperOS 2 | |
| Brightness (peak) | 3500 nits | 3200 nits | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | IP64 | |
| Dimensions | 162.9×77.9×8.2 mm | 164.0×75.4×7.9 mm | |
| Weight | 227 g | 183 g | |
| Launch price | $420 | — |
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Redmi Note 15 4G
- Main: 108MP f/f/1.7
- Front: 20MP
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Redmi Note 15 4G
- 6.8" AMOLED
- Resolution: 1080x2392
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Redmi Note 15 4G
- 6000 mAh
- Wired: 33W
- No wireless charging
We compared Redmi K90 Ultra and Redmi Note 15 4G, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Redmi Note 15 4G by 441.5% in our overall performance rating.
Redmi Note 15 4G
Price unknownperformance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Redmi Note 15 4G (92/100 vs 44/100).
display
In the "display" category, the Redmi K90 Ultra notably outperforms the Redmi Note 15 4G (94/100 vs 79/100).
camera
In the "camera" category, the Redmi Note 15 4G is a bit better (42/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra notably outperforms the Redmi Note 15 4G (78/100 vs 53/100).
portability
In the "portability" category, the Redmi Note 15 4G significantly outperforms the Redmi K90 Ultra (70/100 vs 40/100).
Which is better: the Redmi K90 Ultra or the Redmi Note 15 4G?
The Redmi K90 Ultra significantly outperforms the Redmi Note 15 4G by 22 points (73/100 vs 51/100).
What is the rating of the Redmi K90 Ultra and the Redmi Note 15 4G?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Redmi Note 15 4G — 51/100.
Which has the better camera: the Redmi K90 Ultra or the Redmi Note 15 4G?
The Redmi Note 15 4G leads on camera score (42/100 vs 37/100).
Which is more powerful: the Redmi K90 Ultra or the Redmi Note 15 4G?
The Redmi K90 Ultra leads on performance (92/100 vs 44/100).
Should you choose the Redmi K90 Ultra over the Redmi Note 15 4G?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers. The Redmi Note 15 4G is a better fit for everyday use.