Samsung Galaxy A51 vs Samsung Galaxy M21
The Samsung Galaxy A51 (2020) runs on the Exynos 9611, while the Samsung Galaxy M21 (2020) runs on the Exynos 9611. By overall MobileRank rating, the Samsung Galaxy M21 leads — 42/100 vs 34/100 (a 8-point difference). Key differences: the Samsung Galaxy M21 has the bigger battery (6000 mAh vs 4000); the Samsung Galaxy A51 has NFC for contactless payments, the Samsung Galaxy M21 doesn't; the Samsung Galaxy A51 is noticeably lighter (172g vs 188g).
Profile comparison
Category scores
Samsung Galaxy A51
Samsung Galaxy M21
What makes Samsung Galaxy A51 better?
- Lighter: 172g vs 188g
- Better portability (77/100 vs 57/100)
What makes Samsung Galaxy M21 better?
- Bigger battery: 6000 vs 4000 mAh
- Longer battery life (51/100 vs 25/100)
- Better display (83/100 vs 51/100)
Comparison verdict
Comparing the Samsung Galaxy A51 vs the Samsung Galaxy M21, the Samsung Galaxy M21 scores 8 points higher (42/100 vs 34/100). In the "battery" category, the Samsung Galaxy M21 leads (51/100 vs 25/100). In the "performance" category, both devices are on the same level — 25/100. In the "display" category, the Samsung Galaxy M21 significantly outperforms the Samsung Galaxy A51 (83/100 vs 51/100). In the "camera" category, both devices are on the same level — 36/100. In the "battery" category, the Samsung Galaxy M21 notably outperforms the Samsung Galaxy A51 (51/100 vs 25/100). In the "portability" category, the Samsung Galaxy A51 notably outperforms the Samsung Galaxy M21 (77/100 vs 57/100).
Specs comparison
| Specification | Samsung Galaxy A51 | Samsung Galaxy M21 | |
|---|---|---|---|
| Processor | Exynos 9611 | Exynos 9611 | |
| AnTuTu | 355351 | 355351 | |
| Geekbench Single | 365 | 365 | |
| Geekbench Multi | 1107 | 1107 | |
| Display | 6.5" AMOLED | 6.4" Super AMOLED | |
| Resolution | — | 1080x2340 | |
| Refresh rate | 60 Hz | — | |
| Battery | 4000 mAh | 6000 mAh | |
| Charging | — | 15W | |
| Main camera | 48 MP | 48 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Front camera | 32 MP | 20 MP | |
| RAM | 4GB / 6GB | 4GB / 6GB | |
| Storage | 64GB / 128GB | 64GB / 128GB | |
| OS | — | Android 10.0; One UI 2 | |
| Brightness (peak) | — | 420 nits | |
| NFC | yes | no | |
| Dimensions | 158.5×73.6×7.9 mm | 159.0×75.1×8.9 mm | |
| Weight | 172 g | 188 g | |
| Launch price | $399 | — |
Camera comparison
Samsung Galaxy A51
- Main: 48MP
- Front: 32MP
Samsung Galaxy M21
- Main: 48MP f/2.0
- Ultrawide: 8MP
- Front: 20MP
Display comparison
Samsung Galaxy A51
- 6.5" AMOLED
- Refresh rate: 60 Hz
Samsung Galaxy M21
- 6.4" Super AMOLED
- Resolution: 1080x2340
- Refresh rate: —
Battery and charging
Samsung Galaxy A51
- 4000 mAh
- No wireless charging
Samsung Galaxy M21
- 6000 mAh
- Wired: 15W
- No wireless charging
Overall performance score
We compared Samsung Galaxy A51 and Samsung Galaxy M21, covering their specs and all relevant benchmarks.
Equal performance based on benchmark results.
Benchmarks
Launch prices and where to check today's
Samsung Galaxy M21
Price unknownDetailed category analysis
performance
In the "performance" category, both devices are on the same level — 25/100.
display
In the "display" category, the Samsung Galaxy M21 significantly outperforms the Samsung Galaxy A51 (83/100 vs 51/100).
camera
In the "camera" category, both devices are on the same level — 36/100.
battery
In the "battery" category, the Samsung Galaxy M21 notably outperforms the Samsung Galaxy A51 (51/100 vs 25/100).
portability
In the "portability" category, the Samsung Galaxy A51 notably outperforms the Samsung Galaxy M21 (77/100 vs 57/100).
Frequently asked questions
Which is better: the Samsung Galaxy A51 or the Samsung Galaxy M21?
The Samsung Galaxy M21 edges out the Samsung Galaxy A51 by just 8 points — the two devices are very close in overall level.
What is the rating of the Samsung Galaxy A51 and the Samsung Galaxy M21?
The Samsung Galaxy A51 has a MobileRank rating of 34/100, the Samsung Galaxy M21 — 42/100.
Should you choose the Samsung Galaxy A51 over the Samsung Galaxy M21?
Neither model stands out enough to recommend it for a specific use case: the clearest difference is display — better on the Samsung Galaxy M21 (83/100 vs 51/100).