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 (3,233,695 vs 575,630); the Redmi Note 15 4G is noticeably lighter (183g vs 227g).
Profile comparison
Category scores
Redmi K90 Ultra
Redmi Note 15 4G
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 575630
- Better Geekbench Single: 3013 vs 727
- Better Geekbench Multi: 9287 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)
What makes Redmi Note 15 4G better?
- Better main camera: 108MP vs 50MP
- Lighter: 183g vs 227g
- Better camera (42/100 vs 37/100)
- Better portability (70/100 vs 40/100)
Comparison verdict
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).
Specs comparison
| Specification | Redmi K90 Ultra | Redmi Note 15 4G | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | MediaTek Helio G100 Ultra | |
| AnTuTu | 3233695 | 575630 | |
| Geekbench Single | 3013 | 727 | |
| Geekbench Multi | 9287 | 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 | — |
Camera comparison
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Redmi Note 15 4G
- Main: 108MP f/1.7
- Front: 20MP
Display comparison
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
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Redmi Note 15 4G
- 6000 mAh
- Wired: 33W
- No wireless charging
Overall performance score
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 461.8% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Redmi Note 15 4G
Price unknownDetailed category analysis
performance
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).
Frequently asked questions
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.