Redmi K90 Ultra vs Samsung Galaxy A57
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Samsung Galaxy A57 (2026) runs on the Samsung Exynos 1680; launch prices were $420 and $350. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 57/100 (a 16-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 5000); the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 1,359,649); the Samsung Galaxy A57 is noticeably lighter (183g vs 227g).
Profile comparison
Category scores
Redmi K90 Ultra
Samsung Galaxy A57
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 1359649
- Better Geekbench Single: 3013 vs 1382
- Better Geekbench Multi: 9287 vs 4477
- Bigger battery: 8550 vs 5000 mAh
- Faster charging: 100W vs 25W
- Higher refresh rate: 165Hz vs 120Hz
- Higher performance (92/100 vs 67/100)
- Better camera (37/100 vs 34/100)
- Longer battery life (78/100 vs 44/100)
- Better display (94/100 vs 79/100)
What makes Samsung Galaxy A57 better?
- Lighter: 183g vs 227g
- Cheaper at launch: $350 vs $420
- Better portability (80/100 vs 40/100)
Comparison verdict
Comparing the Redmi K90 Ultra vs the Samsung Galaxy A57, the Redmi K90 Ultra scores 16 points higher (73/100 vs 57/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 67/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 44/100). Value score: Redmi K90 Ultra — 72/100, Samsung Galaxy A57 — 48/100; 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 notably outperforms the Samsung Galaxy A57 (92/100 vs 67/100). In the "display" category, the Redmi K90 Ultra notably outperforms the Samsung Galaxy A57 (94/100 vs 79/100). In the "camera" category, the Redmi K90 Ultra and the Samsung Galaxy A57 are nearly equal (37/100 vs 34/100). In the "battery" category, the Redmi K90 Ultra significantly outperforms the Samsung Galaxy A57 (78/100 vs 44/100). In the "portability" category, the Samsung Galaxy A57 significantly outperforms the Redmi K90 Ultra (80/100 vs 40/100).
Specs comparison
| Specification | Redmi K90 Ultra | Samsung Galaxy A57 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Samsung Exynos 1680 | |
| AnTuTu | 3233695 | 1359649 | |
| Geekbench Single | 3013 | 1382 | |
| Geekbench Multi | 9287 | 4477 | |
| Display | 6.8" AMOLED | 6.7" Super AMOLED | |
| Resolution | 1280x2772 | 2340x1080 | |
| Refresh rate | 165 Hz | 120 Hz | |
| Battery | 8550 mAh | 5000 mAh | |
| Charging | 100W | 25W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 8 MP | 8 MP | |
| Front camera | 20 MP | 13 MP | |
| RAM | 12GB / 16GB | 6GB / 8GB | |
| Storage | 256GB / 512GB | 128GB / 256GB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | 3500 nits | 1900 nits | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | IP68 | |
| Dimensions | 162.9×77.9×8.2 mm | 161.5×76.8×6.9 mm | |
| Weight | 227 g | 183 g | |
| Launch price | $420 | $350 |
Camera comparison
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Samsung Galaxy A57
- Main: 50MP f/1.8
- Ultrawide: 8MP
- Front: 13MP
Display comparison
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Samsung Galaxy A57
- 6.7" Super AMOLED
- Resolution: 2340x1080
- Refresh rate: 120 Hz
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Samsung Galaxy A57
- 5000 mAh
- Wired: 25W
- No wireless charging
Overall performance score
We compared Redmi K90 Ultra and Samsung Galaxy A57, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Samsung Galaxy A57 by 137.8% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $70. Samsung Galaxy A57 was $70 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra notably outperforms the Samsung Galaxy A57 (92/100 vs 67/100).
display
In the "display" category, the Redmi K90 Ultra notably outperforms the Samsung Galaxy A57 (94/100 vs 79/100).
camera
In the "camera" category, the Redmi K90 Ultra and the Samsung Galaxy A57 are nearly equal (37/100 vs 34/100).
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the Samsung Galaxy A57 (78/100 vs 44/100).
portability
In the "portability" category, the Samsung Galaxy A57 significantly outperforms the Redmi K90 Ultra (80/100 vs 40/100).
Frequently asked questions
Which is better: the Redmi K90 Ultra or the Samsung Galaxy A57?
The Redmi K90 Ultra is noticeably better than the Samsung Galaxy A57 — the overall rating gap is 16 points.
What is the rating of the Redmi K90 Ultra and the Samsung Galaxy A57?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Samsung Galaxy A57 — 57/100.
Which is more powerful: the Redmi K90 Ultra or the Samsung Galaxy A57?
The Redmi K90 Ultra leads on performance (92/100 vs 67/100).
Should you choose the Redmi K90 Ultra over the Samsung Galaxy A57?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life. The Samsung Galaxy A57 is a better fit for active users.