Realme C100x vs Redmi K90
Comparing the Realme C100x (2026) and the Redmi K90 (2025) on specs and benchmarks. By overall MobileRank rating, the Redmi K90 leads — 68/100 vs 31/100 (a 37-point difference). Key differences: the Realme C100x has the bigger battery (7500 mAh vs 7100).
Realme C100x
Redmi K90
- Bigger battery: 7500 vs 7100 mAh
- Better design/ergonomics (50/100 vs 42/100)
- Higher performance (69/100 vs 0/100)
- Better camera (53/100 vs 24/100)
- Longer battery life (71/100 vs 52/100)
- Better value for money (82/100 vs 55/100)
Comparing the Realme C100x vs the Redmi K90, the Redmi K90 scores 37 points higher (68/100 vs 31/100). In the "performance" category, the Redmi K90 leads (69/100 vs 0/100). In the "camera" category, the Redmi K90 leads (53/100 vs 24/100). In the "battery" category, the Redmi K90 leads (71/100 vs 52/100). In the "value for money" category, the Redmi K90 leads (82/100 vs 55/100). In the "performance" category, the Redmi K90 significantly outperforms the Realme C100x (69/100 vs 0/100). In the "display" category, both devices are on the same level — 100/100. In the "camera" category, the Redmi K90 notably outperforms the Realme C100x (53/100 vs 24/100). In the "battery" category, the Redmi K90 notably outperforms the Realme C100x (71/100 vs 52/100). In the "design" category, the Realme C100x is a bit better (50/100 vs 42/100). In the "value for money" category, the Redmi K90 notably outperforms the Realme C100x (82/100 vs 55/100).
| Specification | Realme C100x | Redmi K90 | |
|---|---|---|---|
| Processor | — | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | — | 3088357 | |
| Geekbench Single | — | 3050 | |
| Geekbench Multi | — | 9300 | |
| Display | 6.8" IPS LCD | 6.6" AMOLED | |
| Resolution | 720x1640 | 2510x1156 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 7500 mAh | 7100 mAh | |
| Charging | — | 100W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 5 MP | 20 MP | |
| RAM | 4GB | 12GB / 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | — | 3500 nits | |
| NFC | yes | yes | |
| Protection | IP64 | IP68 | |
| Dimensions | — | 157.5×75.3×8.0 mm | |
| Weight | — | 206 g | |
| Price | — | $401 |
Realme C100x
- Main: 50MP f/f/1.8
- Front: 5MP
Redmi K90
- Main: 50MP f/f/1.9
- Ultrawide: 8MP
- Telephoto: 50MP
- Front: 20MP
Realme C100x
- 6.8" IPS LCD
- Resolution: 720x1640
- Refresh rate: 120 Hz
Redmi K90
- 6.6" AMOLED
- Resolution: 2510x1156
- Refresh rate: 120 Hz
Realme C100x
- 7500 mAh
- No wireless charging
Redmi K90
- 7100 mAh
- Wired: 100W
- No wireless charging
Realme C100x
Price unknownperformance
In the "performance" category, the Redmi K90 significantly outperforms the Realme C100x (69/100 vs 0/100).
display
In the "display" category, both devices are on the same level — 100/100.
camera
In the "camera" category, the Redmi K90 notably outperforms the Realme C100x (53/100 vs 24/100).
battery
In the "battery" category, the Redmi K90 notably outperforms the Realme C100x (71/100 vs 52/100).
design
In the "design" category, the Realme C100x is a bit better (50/100 vs 42/100).
value for money
In the "value for money" category, the Redmi K90 notably outperforms the Realme C100x (82/100 vs 55/100).
Which is better: the Realme C100x or the Redmi K90?
The Redmi K90 significantly outperforms the Realme C100x by 37 points (68/100 vs 31/100).
What is the rating of the Realme C100x and the Redmi K90?
The Realme C100x has a MobileRank rating of 31/100, the Redmi K90 — 68/100.
Which has the better camera: the Realme C100x or the Redmi K90?
The Redmi K90 leads on camera score (53/100 vs 24/100).
Which is more powerful: the Realme C100x or the Redmi K90?
The Redmi K90 leads on performance (69/100 vs 0/100).
Should you choose the Realme C100x over the Redmi K90?
The Realme C100x is a better fit for everyday use. The Redmi K90 is a better fit for active users, budget-conscious buyers.