Redmi 15a vs Redmi K90 Ultra
The Redmi 15a (2026) runs on the Unisoc T8300, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $130 and $420. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 42/100 (a 31-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 6300); the main camera is 32 MP vs 50 MP; the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 639,225); the Redmi K90 Ultra has NFC for contactless payments, the Redmi 15a doesn't; the Redmi 15a is noticeably lighter (210g vs 227g).
Profile comparison
Category scores
Redmi 15a
Redmi K90 Ultra
What makes Redmi 15a better?
- Lighter: 210g vs 227g
- Cheaper at launch: $130 vs $420
- Better portability (51/100 vs 40/100)
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 639225
- Better Geekbench Single: 3013 vs 880
- Better Geekbench Multi: 9287 vs 2073
- Bigger battery: 8550 vs 6300 mAh
- Faster charging: 100W vs 15W
- Better main camera: 50MP vs 32MP
- Higher refresh rate: 165Hz vs 120Hz
- Higher performance (92/100 vs 47/100)
- Better camera (37/100 vs 20/100)
- Longer battery life (78/100 vs 52/100)
- Better display (94/100 vs 55/100)
Comparison verdict
Comparing the Redmi 15a vs the Redmi K90 Ultra, the Redmi K90 Ultra scores 31 points higher (73/100 vs 42/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 47/100). In the "camera" category, the Redmi K90 Ultra leads (37/100 vs 20/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 52/100). Value score: Redmi 15a — 64/100, 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 15a (92/100 vs 47/100). In the "display" category, the Redmi K90 Ultra significantly outperforms the Redmi 15a (94/100 vs 55/100). In the "camera" category, the Redmi K90 Ultra notably outperforms the Redmi 15a (37/100 vs 20/100). In the "battery" category, the Redmi K90 Ultra notably outperforms the Redmi 15a (78/100 vs 52/100). In the "portability" category, the Redmi 15a is a bit better (51/100 vs 40/100).
Specs comparison
| Specification | Redmi 15a | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | Unisoc T8300 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 639225 | 3233695 | |
| Geekbench Single | 880 | 3013 | |
| Geekbench Multi | 2073 | 9287 | |
| Display | 6.9" IPS LCD | 6.8" AMOLED | |
| Resolution | 720x1600 | 1280x2772 | |
| Refresh rate | 120 Hz | 165 Hz | |
| Battery | 6300 mAh | 8550 mAh | |
| Charging | 15W | 100W | |
| Main camera | 32 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Front camera | 8 MP | 20 MP | |
| RAM | 4GB / 6GB | 12GB / 16GB | |
| Storage | 64GB / 128GB | 256GB / 512GB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | 800 nits | 3500 nits | |
| NFC | no | yes | |
| Protection | — | IP68/IP69 | |
| Dimensions | 171.6×79.5×8.2 mm | 162.9×77.9×8.2 mm | |
| Weight | 210 g | 227 g | |
| Launch price | $130 | $420 |
Camera comparison
Redmi 15a
- Main: 32MP f/2.0
- Front: 8MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Display comparison
Redmi 15a
- 6.9" IPS LCD
- Resolution: 720x1600
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Battery and charging
Redmi 15a
- 6300 mAh
- Wired: 15W
- No wireless charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Redmi 15a and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Redmi 15a by 80.2% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $290. Redmi 15a was $290 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Redmi 15a (92/100 vs 47/100).
display
In the "display" category, the Redmi K90 Ultra significantly outperforms the Redmi 15a (94/100 vs 55/100).
camera
In the "camera" category, the Redmi K90 Ultra notably outperforms the Redmi 15a (37/100 vs 20/100).
battery
In the "battery" category, the Redmi K90 Ultra notably outperforms the Redmi 15a (78/100 vs 52/100).
portability
In the "portability" category, the Redmi 15a is a bit better (51/100 vs 40/100).
Frequently asked questions
Which is better: the Redmi 15a or the Redmi K90 Ultra?
The Redmi K90 Ultra significantly outperforms the Redmi 15a by 31 points (73/100 vs 42/100).
What is the rating of the Redmi 15a and the Redmi K90 Ultra?
The Redmi 15a has a MobileRank rating of 42/100, the Redmi K90 Ultra — 73/100.
Which has the better camera: the Redmi 15a or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on camera score (37/100 vs 20/100).
Which is more powerful: the Redmi 15a or the Redmi K90 Ultra?
The Redmi K90 Ultra leads on performance (92/100 vs 47/100).
Should you choose the Redmi 15a over the Redmi K90 Ultra?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.