Redmi K80 Ultra vs Samsung Galaxy A51
The Redmi K80 Ultra (2025) runs on the MediaTek Dimensity 9400+, while the Samsung Galaxy A51 (2020) runs on the Exynos 9611; estimated prices are $350 and $399. By overall MobileRank rating, the Redmi K80 Ultra leads — 60/100 vs 18/100 (a 42-point difference). Key differences: the Redmi K80 Ultra has the bigger battery (7410 mAh vs 4000); the main camera is 50 MP vs 48 MP; the Redmi K80 Ultra is faster in AnTuTu (2,876,004 vs 355,351); the Samsung Galaxy A51 is noticeably lighter (172g vs 219g).
Redmi K80 Ultra
Samsung Galaxy A51
- Higher AnTuTu: 2876004 vs 355351
- Better Geekbench Single: 2729 vs 365
- Better Geekbench Multi: 8430 vs 1107
- Bigger battery: 7410 vs 4000 mAh
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 144Hz vs 60Hz
- Cheaper: $350 vs $399
- Higher performance (61/100 vs 0/100)
- Longer battery life (72/100 vs 12/100)
- Better display (100/100 vs 0/100)
- Better value for money (86/100 vs 82/100)
- Lighter: 172g vs 219g
- Better design/ergonomics (85/100 vs 26/100)
Comparing the Redmi K80 Ultra vs the Samsung Galaxy A51, the Redmi K80 Ultra scores 42 points higher (60/100 vs 18/100). In the "performance" category, the Redmi K80 Ultra leads (61/100 vs 0/100). In the "battery" category, the Redmi K80 Ultra leads (72/100 vs 12/100). In the "performance" category, the Redmi K80 Ultra significantly outperforms the Samsung Galaxy A51 (61/100 vs 0/100). In the "display" category, the Redmi K80 Ultra 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 K80 Ultra significantly outperforms the Samsung Galaxy A51 (72/100 vs 12/100). In the "design" category, the Samsung Galaxy A51 significantly outperforms the Redmi K80 Ultra (85/100 vs 26/100). In the "value for money" category, the Redmi K80 Ultra and the Samsung Galaxy A51 are nearly equal (86/100 vs 82/100).
| Specification | Redmi K80 Ultra | Samsung Galaxy A51 | |
|---|---|---|---|
| Processor | MediaTek Dimensity 9400+ | Exynos 9611 | |
| AnTuTu | 2876004 | 355351 | |
| Geekbench Single | 2729 | 365 | |
| Geekbench Multi | 8430 | 1107 | |
| Display | 6.8" OLED | 6.5" AMOLED | |
| Resolution | 1280x2772 | — | |
| Refresh rate | 144 Hz | 60 Hz | |
| Battery | 7410 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 15 | — | |
| Brightness (peak) | 3200 nits | — | |
| NFC | yes | yes | |
| Protection | IP68 | — | |
| Dimensions | — | 158.5×73.6×7.9 mm | |
| Weight | 219 g | 172 g | |
| Price | $350 | $399 |
Redmi K80 Ultra
- Main: 50MP f/f/1.9
- Ultrawide: 8MP
- Front: 20MP
Samsung Galaxy A51
- Main: 48MP
- Front: 32MP
Redmi K80 Ultra
- 6.8" OLED
- Resolution: 1280x2772
- Refresh rate: 144 Hz
Samsung Galaxy A51
- 6.5" AMOLED
- Refresh rate: 60 Hz
Redmi K80 Ultra
- 7410 mAh
- Wired: 100W
- No wireless charging
Samsung Galaxy A51
- 4000 mAh
- No wireless charging
We compared Redmi K80 Ultra and Samsung Galaxy A51, covering their specs and all relevant benchmarks.
Redmi K80 Ultra leads Samsung Galaxy A51 by 709.3% in our overall performance rating.
Price difference: $49. Redmi K80 Ultra is cheaper by $49.
performance
In the "performance" category, the Redmi K80 Ultra significantly outperforms the Samsung Galaxy A51 (61/100 vs 0/100).
display
In the "display" category, the Redmi K80 Ultra 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 K80 Ultra significantly outperforms the Samsung Galaxy A51 (72/100 vs 12/100).
design
In the "design" category, the Samsung Galaxy A51 significantly outperforms the Redmi K80 Ultra (85/100 vs 26/100).
value for money
In the "value for money" category, the Redmi K80 Ultra and the Samsung Galaxy A51 are nearly equal (86/100 vs 82/100).
Which is better: the Redmi K80 Ultra or the Samsung Galaxy A51?
The Redmi K80 Ultra significantly outperforms the Samsung Galaxy A51 by 42 points (60/100 vs 18/100).
What is the rating of the Redmi K80 Ultra and the Samsung Galaxy A51?
The Redmi K80 Ultra has a MobileRank rating of 60/100, the Samsung Galaxy A51 — 18/100.
Which is more powerful: the Redmi K80 Ultra or the Samsung Galaxy A51?
The Redmi K80 Ultra leads on performance (61/100 vs 0/100).
Should you choose the Redmi K80 Ultra over the Samsung Galaxy A51?
The Redmi K80 Ultra is a better fit for active users, budget-conscious buyers. The Samsung Galaxy A51 is a better fit for budget-conscious buyers.