Redmi K100 vs Samsung Galaxy A21s
The Redmi K100 (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Samsung Galaxy A21s (2020) runs on the Exynos 850. By overall MobileRank rating, the Redmi K100 leads — 73/100 vs 29/100 (a 44-point difference). Key differences: the Redmi K100 has the bigger battery (10000 mAh vs 5000); the main camera is 50 MP vs 48 MP; the Redmi K100 is faster in AnTuTu (3,298,726 vs 234,339); the Samsung Galaxy A21s is noticeably lighter (192g vs 234g).
Profile comparison
Category scores
Redmi K100
Samsung Galaxy A21s
What makes Redmi K100 better?
- Higher AnTuTu: 3298726 vs 234339
- Better Geekbench Single: 3013 vs 300
- Better Geekbench Multi: 9287 vs 836
- Bigger battery: 10000 vs 5000 mAh
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 165Hz vs 60Hz
- Higher performance (92/100 vs 16/100)
- Better camera (37/100 vs 30/100)
- Longer battery life (80/100 vs 52/100)
- Better display (94/100 vs 32/100)
What makes Samsung Galaxy A21s better?
- Lighter: 192g vs 234g
- Better portability (55/100 vs 25/100)
Comparison verdict
Comparing the Redmi K100 vs the Samsung Galaxy A21s, the Redmi K100 scores 44 points higher (73/100 vs 29/100). In the "performance" category, the Redmi K100 leads (92/100 vs 16/100). In the "battery" category, the Redmi K100 leads (80/100 vs 52/100). In the "performance" category, the Redmi K100 significantly outperforms the Samsung Galaxy A21s (92/100 vs 16/100). In the "display" category, the Redmi K100 significantly outperforms the Samsung Galaxy A21s (94/100 vs 32/100). In the "camera" category, the Redmi K100 is a bit better (37/100 vs 30/100). In the "battery" category, the Redmi K100 notably outperforms the Samsung Galaxy A21s (80/100 vs 52/100). In the "portability" category, the Samsung Galaxy A21s significantly outperforms the Redmi K100 (55/100 vs 25/100).
Specs comparison
| Specification | Redmi K100 | Samsung Galaxy A21s | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Exynos 850 | |
| AnTuTu | 3298726 | 234339 | |
| Geekbench Single | 3013 | 300 | |
| Geekbench Multi | 9287 | 836 | |
| Display | 6.8" AMOLED | 6.5" IPS LCD | |
| Resolution | 1280x2772 | — | |
| Refresh rate | 165 Hz | 60 Hz | |
| Battery | 10000 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 | 32GB / 64GB | |
| OS | Android 17 | — | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | yes | |
| Protection | IP68 | — | |
| Dimensions | — | 163.7×75.3×8.9 mm | |
| Weight | 234 g | 192 g | |
| Launch price | — | $215 |
Camera comparison
Redmi K100
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Samsung Galaxy A21s
- Main: 48MP
- Front: 13MP
Display comparison
Redmi K100
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Samsung Galaxy A21s
- 6.5" IPS LCD
- Refresh rate: 60 Hz
Battery and charging
Redmi K100
- 10000 mAh
- Wired: 100W
- No wireless charging
Samsung Galaxy A21s
- 5000 mAh
- No wireless charging
Overall performance score
We compared Redmi K100 and Samsung Galaxy A21s, covering their specs and all relevant benchmarks.
Redmi K100 leads Samsung Galaxy A21s by 1307.7% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Redmi K100
Price unknownDetailed category analysis
performance
In the "performance" category, the Redmi K100 significantly outperforms the Samsung Galaxy A21s (92/100 vs 16/100).
display
In the "display" category, the Redmi K100 significantly outperforms the Samsung Galaxy A21s (94/100 vs 32/100).
camera
In the "camera" category, the Redmi K100 is a bit better (37/100 vs 30/100).
battery
In the "battery" category, the Redmi K100 notably outperforms the Samsung Galaxy A21s (80/100 vs 52/100).
portability
In the "portability" category, the Samsung Galaxy A21s significantly outperforms the Redmi K100 (55/100 vs 25/100).
Frequently asked questions
Which is better: the Redmi K100 or the Samsung Galaxy A21s?
The Redmi K100 significantly outperforms the Samsung Galaxy A21s by 44 points (73/100 vs 29/100).
What is the rating of the Redmi K100 and the Samsung Galaxy A21s?
The Redmi K100 has a MobileRank rating of 73/100, the Samsung Galaxy A21s — 29/100.
Which has the better camera: the Redmi K100 or the Samsung Galaxy A21s?
The Redmi K100 leads on camera score (37/100 vs 30/100).
Which is more powerful: the Redmi K100 or the Samsung Galaxy A21s?
The Redmi K100 leads on performance (92/100 vs 16/100).
Should you choose the Redmi K100 over the Samsung Galaxy A21s?
The Redmi K100 is a better fit for gamers and power users, those who care about battery life.