Redmi K90 Max vs Samsung Galaxy A51
The Redmi K90 Max (2026) runs on the MediaTek Dimensity 9500, while the Samsung Galaxy A51 (2020) runs on the Exynos 9611; estimated prices are $504 and $399. By overall MobileRank rating, the Redmi K90 Max leads — 67/100 vs 18/100 (a 49-point difference). Key differences: the Redmi K90 Max has the bigger battery (8550 mAh vs 4000); the main camera is 50 MP vs 48 MP; the Redmi K90 Max is faster in AnTuTu (3,803,420 vs 355,351); the Samsung Galaxy A51 is noticeably lighter (172g vs 227g).
Redmi K90 Max
Samsung Galaxy A51
- Higher AnTuTu: 3803420 vs 355351
- Better Geekbench Single: 3228 vs 365
- Better Geekbench Multi: 9553 vs 1107
- Bigger battery: 8550 vs 4000 mAh
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 165Hz vs 60Hz
- Higher performance (82/100 vs 0/100)
- Longer battery life (77/100 vs 12/100)
- Better display (100/100 vs 0/100)
- Lighter: 172g vs 227g
- Cheaper: $399 vs $504
- Better design/ergonomics (85/100 vs 16/100)
- Better value for money (82/100 vs 75/100)
Comparing the Redmi K90 Max vs the Samsung Galaxy A51, the Redmi K90 Max scores 49 points higher (67/100 vs 18/100). In the "performance" category, the Redmi K90 Max leads (82/100 vs 0/100). In the "battery" category, the Redmi K90 Max leads (77/100 vs 12/100). In the "performance" category, the Redmi K90 Max significantly outperforms the Samsung Galaxy A51 (82/100 vs 0/100). In the "display" category, the Redmi K90 Max significantly outperforms the Samsung Galaxy A51 (100/100 vs 0/100). In the "camera" category, both devices are on the same level — 32/100. In the "battery" category, the Redmi K90 Max significantly outperforms the Samsung Galaxy A51 (77/100 vs 12/100). In the "design" category, the Samsung Galaxy A51 significantly outperforms the Redmi K90 Max (85/100 vs 16/100). In the "value for money" category, the Samsung Galaxy A51 is a bit better (82/100 vs 75/100).
| Specification | Redmi K90 Max | Samsung Galaxy A51 | |
|---|---|---|---|
| Processor | MediaTek Dimensity 9500 | Exynos 9611 | |
| AnTuTu | 3803420 | 355351 | |
| Geekbench Single | 3228 | 365 | |
| Geekbench Multi | 9553 | 1107 | |
| Display | 6.8" AMOLED | 6.5" AMOLED | |
| Resolution | 2772x1280 | — | |
| Refresh rate | 165 Hz | 60 Hz | |
| Battery | 8550 mAh | 4000 mAh | |
| Charging | 100W | — | |
| Main camera | 50 MP | 48 MP | |
| Ultrawide | 8 MP | 0 MP | |
| Front camera | 20 MP | 32 MP | |
| RAM | 12GB / 16GB | 4GB / 6GB | |
| Storage | 256GB / 512GB / 1TB | 64GB / 128GB | |
| OS | Android 16 | — | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | yes | |
| Protection | IP66 | — | |
| Dimensions | 162.9×77.9×8.1 mm | 158.5×73.6×7.9 mm | |
| Weight | 227 g | 172 g | |
| Price | $504 | $399 |
Redmi K90 Max
- Main: 50MP f/f/1.68
- Ultrawide: 8MP
- Front: 20MP
Samsung Galaxy A51
- Main: 48MP
- Front: 32MP
Redmi K90 Max
- 6.8" AMOLED
- Resolution: 2772x1280
- Refresh rate: 165 Hz
Samsung Galaxy A51
- 6.5" AMOLED
- Refresh rate: 60 Hz
Redmi K90 Max
- 8550 mAh
- Wired: 100W
- No wireless charging
Samsung Galaxy A51
- 4000 mAh
- No wireless charging
We compared Redmi K90 Max and Samsung Galaxy A51, covering their specs and all relevant benchmarks.
Redmi K90 Max leads Samsung Galaxy A51 by 970.3% in our overall performance rating.
Price difference: $105. Samsung Galaxy A51 is cheaper by $105.
performance
In the "performance" category, the Redmi K90 Max significantly outperforms the Samsung Galaxy A51 (82/100 vs 0/100).
display
In the "display" category, the Redmi K90 Max significantly outperforms the Samsung Galaxy A51 (100/100 vs 0/100).
camera
In the "camera" category, both devices are on the same level — 32/100.
battery
In the "battery" category, the Redmi K90 Max significantly outperforms the Samsung Galaxy A51 (77/100 vs 12/100).
design
In the "design" category, the Samsung Galaxy A51 significantly outperforms the Redmi K90 Max (85/100 vs 16/100).
value for money
In the "value for money" category, the Samsung Galaxy A51 is a bit better (82/100 vs 75/100).
Which is better: the Redmi K90 Max or the Samsung Galaxy A51?
The Redmi K90 Max significantly outperforms the Samsung Galaxy A51 by 49 points (67/100 vs 18/100).
What is the rating of the Redmi K90 Max and the Samsung Galaxy A51?
The Redmi K90 Max has a MobileRank rating of 67/100, the Samsung Galaxy A51 — 18/100.
Which is more powerful: the Redmi K90 Max or the Samsung Galaxy A51?
The Redmi K90 Max leads on performance (82/100 vs 0/100).
Should you choose the Redmi K90 Max over the Samsung Galaxy A51?
The Redmi K90 Max is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers. The Samsung Galaxy A51 is a better fit for budget-conscious buyers.