Realme C100x vs Redmi K80 Ultra
Comparing the Realme C100x (2026) and the Redmi K80 Ultra (2025) on specs and benchmarks. By overall MobileRank rating, the Redmi K80 Ultra leads — 60/100 vs 31/100 (a 29-point difference). Key differences: the Realme C100x has the bigger battery (7500 mAh vs 7410).
Realme C100x
Redmi K80 Ultra
- Bigger battery: 7500 vs 7410 mAh
- Better design/ergonomics (50/100 vs 26/100)
- Higher refresh rate: 144Hz vs 120Hz
- Higher performance (61/100 vs 0/100)
- Better camera (32/100 vs 24/100)
- Longer battery life (72/100 vs 52/100)
- Better value for money (86/100 vs 55/100)
Comparing the Realme C100x vs the Redmi K80 Ultra, the Redmi K80 Ultra scores 29 points higher (60/100 vs 31/100). 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 52/100). In the "value for money" category, the Redmi K80 Ultra leads (86/100 vs 55/100). In the "performance" category, the Redmi K80 Ultra significantly outperforms the Realme C100x (61/100 vs 0/100). In the "display" category, both devices are on the same level — 100/100. In the "camera" category, the Redmi K80 Ultra is a bit better (32/100 vs 24/100). In the "battery" category, the Redmi K80 Ultra notably outperforms the Realme C100x (72/100 vs 52/100). In the "design" category, the Realme C100x notably outperforms the Redmi K80 Ultra (50/100 vs 26/100). In the "value for money" category, the Redmi K80 Ultra significantly outperforms the Realme C100x (86/100 vs 55/100).
| Specification | Realme C100x | Redmi K80 Ultra | |
|---|---|---|---|
| Processor | — | MediaTek Dimensity 9400+ | |
| AnTuTu | — | 2876004 | |
| Geekbench Single | — | 2729 | |
| Geekbench Multi | — | 8430 | |
| Display | 6.8" IPS LCD | 6.8" OLED | |
| Resolution | 720x1640 | 1280x2772 | |
| Refresh rate | 120 Hz | 144 Hz | |
| Battery | 7500 mAh | 7410 mAh | |
| Charging | — | 100W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Front camera | 5 MP | 20 MP | |
| RAM | 4GB | 12GB / 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 15 | |
| Brightness (peak) | — | 3200 nits | |
| NFC | yes | yes | |
| Protection | IP64 | IP68 | |
| Weight | — | 219 g | |
| Price | — | $350 |
Realme C100x
- Main: 50MP f/f/1.8
- Front: 5MP
Redmi K80 Ultra
- Main: 50MP f/f/1.9
- Ultrawide: 8MP
- Front: 20MP
Realme C100x
- 6.8" IPS LCD
- Resolution: 720x1640
- Refresh rate: 120 Hz
Redmi K80 Ultra
- 6.8" OLED
- Resolution: 1280x2772
- Refresh rate: 144 Hz
Realme C100x
- 7500 mAh
- No wireless charging
Redmi K80 Ultra
- 7410 mAh
- Wired: 100W
- No wireless charging
Realme C100x
Price unknownperformance
In the "performance" category, the Redmi K80 Ultra significantly outperforms the Realme C100x (61/100 vs 0/100).
display
In the "display" category, both devices are on the same level — 100/100.
camera
In the "camera" category, the Redmi K80 Ultra is a bit better (32/100 vs 24/100).
battery
In the "battery" category, the Redmi K80 Ultra notably outperforms the Realme C100x (72/100 vs 52/100).
design
In the "design" category, the Realme C100x notably outperforms the Redmi K80 Ultra (50/100 vs 26/100).
value for money
In the "value for money" category, the Redmi K80 Ultra significantly outperforms the Realme C100x (86/100 vs 55/100).
Which is better: the Realme C100x or the Redmi K80 Ultra?
The Redmi K80 Ultra significantly outperforms the Realme C100x by 29 points (60/100 vs 31/100).
What is the rating of the Realme C100x and the Redmi K80 Ultra?
The Realme C100x has a MobileRank rating of 31/100, the Redmi K80 Ultra — 60/100.
Which has the better camera: the Realme C100x or the Redmi K80 Ultra?
The Redmi K80 Ultra leads on camera score (32/100 vs 24/100).
Which is more powerful: the Realme C100x or the Redmi K80 Ultra?
The Redmi K80 Ultra leads on performance (61/100 vs 0/100).
Should you choose the Realme C100x over the Redmi K80 Ultra?
The Realme C100x is a better fit for everyday use. The Redmi K80 Ultra is a better fit for active users, budget-conscious buyers.