Redmi K80 Ultra vs Samsung Galaxy A21s
The Redmi K80 Ultra (2025) runs on the MediaTek Dimensity 9400+, while the Samsung Galaxy A21s (2020) runs on the Exynos 850; launch prices were $350 and $215. By overall MobileRank rating, the Redmi K80 Ultra leads — 73/100 vs 29/100 (a 44-point difference). Key differences: the Redmi K80 Ultra has the bigger battery (7410 mAh vs 5000); the main camera is 50 MP vs 48 MP; the Redmi K80 Ultra is faster in AnTuTu (2,874,956 vs 234,339); the Samsung Galaxy A21s is noticeably lighter (192g vs 219g).
Profile comparison
Category scores
Redmi K80 Ultra
Samsung Galaxy A21s
What makes Redmi K80 Ultra better?
- Higher AnTuTu: 2874956 vs 234339
- Better Geekbench Single: 2729 vs 300
- Better Geekbench Multi: 8430 vs 836
- Bigger battery: 7410 vs 5000 mAh
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 144Hz vs 60Hz
- Higher performance (89/100 vs 16/100)
- Better camera (37/100 vs 30/100)
- Longer battery life (86/100 vs 52/100)
- Better display (94/100 vs 32/100)
What makes Samsung Galaxy A21s better?
- Lighter: 192g vs 219g
- Cheaper at launch: $215 vs $350
- Better portability (55/100 vs 40/100)
Comparison verdict
Comparing the Redmi K80 Ultra vs the Samsung Galaxy A21s, the Redmi K80 Ultra scores 44 points higher (73/100 vs 29/100). In the "performance" category, the Redmi K80 Ultra leads (89/100 vs 16/100). In the "battery" category, the Redmi K80 Ultra leads (86/100 vs 52/100). Value score: Redmi K80 Ultra — 80/100, 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 K80 Ultra significantly outperforms the Samsung Galaxy A21s (89/100 vs 16/100). In the "display" category, the Redmi K80 Ultra significantly outperforms the Samsung Galaxy A21s (94/100 vs 32/100). In the "camera" category, the Redmi K80 Ultra is a bit better (37/100 vs 30/100). In the "battery" category, the Redmi K80 Ultra significantly outperforms the Samsung Galaxy A21s (86/100 vs 52/100). In the "portability" category, the Samsung Galaxy A21s notably outperforms the Redmi K80 Ultra (55/100 vs 40/100).
Specs comparison
| Specification | Redmi K80 Ultra | Samsung Galaxy A21s | |
|---|---|---|---|
| Processor | MediaTek Dimensity 9400+ | Exynos 850 | |
| AnTuTu | 2874956 | 234339 | |
| Geekbench Single | 2729 | 300 | |
| Geekbench Multi | 8430 | 836 | |
| Display | 6.8" OLED | 6.5" IPS LCD | |
| Resolution | 1280x2772 | — | |
| Refresh rate | 144 Hz | 60 Hz | |
| Battery | 7410 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 15 | — | |
| Brightness (peak) | 3200 nits | — | |
| NFC | yes | yes | |
| Protection | IP68 | — | |
| Dimensions | — | 163.7×75.3×8.9 mm | |
| Weight | 219 g | 192 g | |
| Launch price | $350 | $215 |
Camera comparison
Redmi K80 Ultra
- Main: 50MP f/1.9
- Ultrawide: 8MP
- Front: 20MP
Samsung Galaxy A21s
- Main: 48MP
- Front: 13MP
Display comparison
Redmi K80 Ultra
- 6.8" OLED
- Resolution: 1280x2772
- Refresh rate: 144 Hz
Samsung Galaxy A21s
- 6.5" IPS LCD
- Refresh rate: 60 Hz
Battery and charging
Redmi K80 Ultra
- 7410 mAh
- Wired: 100W
- Wireless charging: no data
Samsung Galaxy A21s
- 5000 mAh
- No wireless charging
Overall performance score
We compared Redmi K80 Ultra and Samsung Galaxy A21s, covering their specs and all relevant benchmarks.
Redmi K80 Ultra leads Samsung Galaxy A21s by 1126.8% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $135. Samsung Galaxy A21s was $135 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K80 Ultra significantly outperforms the Samsung Galaxy A21s (89/100 vs 16/100).
display
In the "display" category, the Redmi K80 Ultra significantly outperforms the Samsung Galaxy A21s (94/100 vs 32/100).
camera
In the "camera" category, the Redmi K80 Ultra is a bit better (37/100 vs 30/100).
battery
In the "battery" category, the Redmi K80 Ultra significantly outperforms the Samsung Galaxy A21s (86/100 vs 52/100).
portability
In the "portability" category, the Samsung Galaxy A21s notably outperforms the Redmi K80 Ultra (55/100 vs 40/100).
Frequently asked questions
Which is better: the Redmi K80 Ultra or the Samsung Galaxy A21s?
The Redmi K80 Ultra significantly outperforms the Samsung Galaxy A21s by 44 points (73/100 vs 29/100).
What is the rating of the Redmi K80 Ultra and the Samsung Galaxy A21s?
The Redmi K80 Ultra has a MobileRank rating of 73/100, the Samsung Galaxy A21s — 29/100.
Which has the better camera: the Redmi K80 Ultra or the Samsung Galaxy A21s?
The Redmi K80 Ultra leads on camera score (37/100 vs 30/100).
Which is more powerful: the Redmi K80 Ultra or the Samsung Galaxy A21s?
The Redmi K80 Ultra leads on performance (89/100 vs 16/100).
Should you choose the Redmi K80 Ultra over the Samsung Galaxy A21s?
The Redmi K80 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.