Redmi K90 Pro Max vs Samsung Galaxy A21s
The Redmi K90 Pro Max (2025) runs on the Qualcomm Snapdragon 8 Elite Gen 5, while the Samsung Galaxy A21s (2020) runs on the Exynos 850; launch prices were $561 and $215. By overall MobileRank rating, the Redmi K90 Pro Max leads — 86/100 vs 29/100 (a 57-point difference). Key differences: the Redmi K90 Pro Max has the bigger battery (7560 mAh vs 5000); the main camera is 50 MP vs 48 MP; the Redmi K90 Pro Max is faster in AnTuTu (3,622,315 vs 234,339); the Samsung Galaxy A21s is noticeably lighter (192g vs 210g).
Profile comparison
Category scores
Redmi K90 Pro Max
Samsung Galaxy A21s
What makes Redmi K90 Pro Max better?
- Higher AnTuTu: 3622315 vs 234339
- Better Geekbench Single: 3639 vs 300
- Better Geekbench Multi: 11047 vs 836
- Bigger battery: 7560 vs 5000 mAh
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 120Hz vs 60Hz
- Higher performance (97/100 vs 16/100)
- Better camera (78/100 vs 30/100)
- Longer battery life (89/100 vs 52/100)
- Better display (81/100 vs 32/100)
What makes Samsung Galaxy A21s better?
- Lighter: 192g vs 210g
- Cheaper at launch: $215 vs $561
- Better portability (55/100 vs 54/100)
Comparison verdict
Comparing the Redmi K90 Pro Max vs the Samsung Galaxy A21s, the Redmi K90 Pro Max scores 57 points higher (86/100 vs 29/100). In the "performance" category, the Redmi K90 Pro Max leads (97/100 vs 16/100). In the "camera" category, the Redmi K90 Pro Max leads (78/100 vs 30/100). In the "battery" category, the Redmi K90 Pro Max leads (89/100 vs 52/100). Value score: Redmi K90 Pro Max — 90/100, Samsung Galaxy A21s — 16/100; 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 Pro Max significantly outperforms the Samsung Galaxy A21s (97/100 vs 16/100). In the "display" category, the Redmi K90 Pro Max significantly outperforms the Samsung Galaxy A21s (81/100 vs 32/100). In the "camera" category, the Redmi K90 Pro Max significantly outperforms the Samsung Galaxy A21s (78/100 vs 30/100). In the "battery" category, the Redmi K90 Pro Max significantly outperforms the Samsung Galaxy A21s (89/100 vs 52/100). In the "portability" category, the Samsung Galaxy A21s and the Redmi K90 Pro Max are nearly equal (55/100 vs 54/100).
Specs comparison
| Specification | Redmi K90 Pro Max | Samsung Galaxy A21s | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite Gen 5 | Exynos 850 | |
| AnTuTu | 3622315 | 234339 | |
| Geekbench Single | 3639 | 300 | |
| Geekbench Multi | 11047 | 836 | |
| Display | 6.9" OLED | 6.5" IPS LCD | |
| Resolution | 2608x1200 | — | |
| Refresh rate | 120 Hz | 60 Hz | |
| Battery | 7560 mAh | 5000 mAh | |
| Charging | 100W | — | |
| Wireless charging | 50W | 0W | |
| Main camera | 50 MP | 48 MP | |
| Ultrawide | 50 MP | 0 MP | |
| Telephoto | 50 MP | 0 MP | |
| Front camera | 32 MP | 13 MP | |
| RAM | 16GB | 3GB / 4GB / 6GB | |
| Storage | 256GB / 512GB / 1TB | 32GB / 64GB | |
| OS | Android 16 | — | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | yes | |
| Protection | IP68 | — | |
| Dimensions | 163.3×77.8×7.9 mm | 163.7×75.3×8.9 mm | |
| Weight | 210 g | 192 g | |
| Launch price | $561 | $215 |
Camera comparison
Redmi K90 Pro Max
- Main: 50MP f/1.88
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Samsung Galaxy A21s
- Main: 48MP
- Front: 13MP
Display comparison
Redmi K90 Pro Max
- 6.9" OLED
- Resolution: 2608x1200
- Refresh rate: 120 Hz
Samsung Galaxy A21s
- 6.5" IPS LCD
- Refresh rate: 60 Hz
Battery and charging
Redmi K90 Pro Max
- 7560 mAh
- Wired: 100W
- Wireless: 50W
Samsung Galaxy A21s
- 5000 mAh
- No wireless charging
Overall performance score
We compared Redmi K90 Pro Max and Samsung Galaxy A21s, covering their specs and all relevant benchmarks.
Redmi K90 Pro Max leads Samsung Galaxy A21s by 1445.8% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $346. Samsung Galaxy A21s was $346 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K90 Pro Max significantly outperforms the Samsung Galaxy A21s (97/100 vs 16/100).
display
In the "display" category, the Redmi K90 Pro Max significantly outperforms the Samsung Galaxy A21s (81/100 vs 32/100).
camera
In the "camera" category, the Redmi K90 Pro Max significantly outperforms the Samsung Galaxy A21s (78/100 vs 30/100).
battery
In the "battery" category, the Redmi K90 Pro Max significantly outperforms the Samsung Galaxy A21s (89/100 vs 52/100).
portability
In the "portability" category, the Samsung Galaxy A21s and the Redmi K90 Pro Max are nearly equal (55/100 vs 54/100).
Frequently asked questions
Which is better: the Redmi K90 Pro Max or the Samsung Galaxy A21s?
The Redmi K90 Pro Max significantly outperforms the Samsung Galaxy A21s by 57 points (86/100 vs 29/100).
What is the rating of the Redmi K90 Pro Max and the Samsung Galaxy A21s?
The Redmi K90 Pro Max has a MobileRank rating of 86/100, the Samsung Galaxy A21s — 29/100.
Which has the better camera: the Redmi K90 Pro Max or the Samsung Galaxy A21s?
The Redmi K90 Pro Max leads on camera score (78/100 vs 30/100).
Which is more powerful: the Redmi K90 Pro Max or the Samsung Galaxy A21s?
The Redmi K90 Pro Max leads on performance (97/100 vs 16/100).
Should you choose the Redmi K90 Pro Max over the Samsung Galaxy A21s?
The Redmi K90 Pro Max is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.