Redmi K90 Max vs Samsung Galaxy A21s
The Redmi K90 Max (2026) runs on the MediaTek Dimensity 9500, while the Samsung Galaxy A21s (2020) runs on the Exynos 850; estimated prices are $504 and $215. By overall MobileRank rating, the Redmi K90 Max leads — 67/100 vs 19/100 (a 48-point difference). Key differences: the Redmi K90 Max has the bigger battery (8550 mAh vs 5000); the main camera is 50 MP vs 48 MP; the Redmi K90 Max is faster in AnTuTu (3,803,420 vs 234,339); the Samsung Galaxy A21s is noticeably lighter (192g vs 227g).
Redmi K90 Max
Samsung Galaxy A21s
- Higher AnTuTu: 3803420 vs 234339
- Better Geekbench Single: 3228 vs 300
- Better Geekbench Multi: 9553 vs 836
- Bigger battery: 8550 vs 5000 mAh
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 165Hz vs 60Hz
- Higher performance (82/100 vs 0/100)
- Better camera (32/100 vs 25/100)
- Longer battery life (77/100 vs 36/100)
- Better display (100/100 vs 0/100)
- Lighter: 192g vs 227g
- Cheaper: $215 vs $504
- Better design/ergonomics (60/100 vs 16/100)
- Better value for money (95/100 vs 75/100)
Comparing the Redmi K90 Max vs the Samsung Galaxy A21s, the Redmi K90 Max scores 48 points higher (67/100 vs 19/100). 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 36/100). In the "value for money" category, the Samsung Galaxy A21s leads (95/100 vs 75/100). In the "performance" category, the Redmi K90 Max significantly outperforms the Samsung Galaxy A21s (82/100 vs 0/100). In the "display" category, the Redmi K90 Max significantly outperforms the Samsung Galaxy A21s (100/100 vs 0/100). In the "camera" category, the Redmi K90 Max is a bit better (32/100 vs 25/100). In the "battery" category, the Redmi K90 Max significantly outperforms the Samsung Galaxy A21s (77/100 vs 36/100). In the "design" category, the Samsung Galaxy A21s significantly outperforms the Redmi K90 Max (60/100 vs 16/100). In the "value for money" category, the Samsung Galaxy A21s notably outperforms the Redmi K90 Max (95/100 vs 75/100).
| Specification | Redmi K90 Max | Samsung Galaxy A21s | |
|---|---|---|---|
| Processor | MediaTek Dimensity 9500 | Exynos 850 | |
| AnTuTu | 3803420 | 234339 | |
| Geekbench Single | 3228 | 300 | |
| Geekbench Multi | 9553 | 836 | |
| Display | 6.8" AMOLED | 6.5" IPS LCD | |
| Resolution | 2772x1280 | — | |
| Refresh rate | 165 Hz | 60 Hz | |
| Battery | 8550 mAh | 5000 mAh | |
| Charging | 100W | — | |
| Main camera | 50 MP | 48 MP | |
| Ultrawide | 8 MP | 0 MP | |
| Front camera | 20 MP | 13 MP | |
| RAM | 12GB / 16GB | 3GB / 4GB / 6GB | |
| Storage | 256GB / 512GB / 1TB | 32GB / 64GB | |
| OS | Android 16 | — | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | yes | |
| Protection | IP66 | — | |
| Dimensions | 162.9×77.9×8.1 mm | 163.7×75.3×8.9 mm | |
| Weight | 227 g | 192 g | |
| Price | $504 | $215 |
Redmi K90 Max
- Main: 50MP f/f/1.68
- Ultrawide: 8MP
- Front: 20MP
Samsung Galaxy A21s
- Main: 48MP
- Front: 13MP
Redmi K90 Max
- 6.8" AMOLED
- Resolution: 2772x1280
- Refresh rate: 165 Hz
Samsung Galaxy A21s
- 6.5" IPS LCD
- Refresh rate: 60 Hz
Redmi K90 Max
- 8550 mAh
- Wired: 100W
- No wireless charging
Samsung Galaxy A21s
- 5000 mAh
- No wireless charging
We compared Redmi K90 Max and Samsung Galaxy A21s, covering their specs and all relevant benchmarks.
Redmi K90 Max leads Samsung Galaxy A21s by 1523.0% in our overall performance rating.
Price difference: $289. Samsung Galaxy A21s is cheaper by $289.
performance
In the "performance" category, the Redmi K90 Max significantly outperforms the Samsung Galaxy A21s (82/100 vs 0/100).
display
In the "display" category, the Redmi K90 Max significantly outperforms the Samsung Galaxy A21s (100/100 vs 0/100).
camera
In the "camera" category, the Redmi K90 Max is a bit better (32/100 vs 25/100).
battery
In the "battery" category, the Redmi K90 Max significantly outperforms the Samsung Galaxy A21s (77/100 vs 36/100).
design
In the "design" category, the Samsung Galaxy A21s significantly outperforms the Redmi K90 Max (60/100 vs 16/100).
value for money
In the "value for money" category, the Samsung Galaxy A21s notably outperforms the Redmi K90 Max (95/100 vs 75/100).
Which is better: the Redmi K90 Max or the Samsung Galaxy A21s?
The Redmi K90 Max significantly outperforms the Samsung Galaxy A21s by 48 points (67/100 vs 19/100).
What is the rating of the Redmi K90 Max and the Samsung Galaxy A21s?
The Redmi K90 Max has a MobileRank rating of 67/100, the Samsung Galaxy A21s — 19/100.
Which has the better camera: the Redmi K90 Max or the Samsung Galaxy A21s?
The Redmi K90 Max leads on camera score (32/100 vs 25/100).
Which is more powerful: the Redmi K90 Max or the Samsung Galaxy A21s?
The Redmi K90 Max leads on performance (82/100 vs 0/100).
Should you choose the Redmi K90 Max over the Samsung Galaxy A21s?
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 A21s is a better fit for budget-conscious buyers.