Realme C100x vs Xiaomi 17 Ultra (China)
The Realme C100x (2026) runs on the Unisoc T7250, while the Xiaomi 17 Ultra (China) (2025) runs on the Snapdragon 8 Elite Gen 5; launch prices were $175 and $892. By overall MobileRank rating, the Xiaomi 17 Ultra (China) leads — 87/100 vs 42/100 (a 45-point difference). Key differences: the Realme C100x has the bigger battery (8000 mAh vs 6800).
Realme C100x
Xiaomi 17 Ultra (China)
- Bigger battery: 8000 vs 6800 mAh
- Lighter: 219g vs 224g
- Cheaper at launch: $175 vs $892
- Overall rating 42/100
- Better Geekbench Single: 3640 vs 600
- Better Geekbench Multi: 11033 vs 1800
- Faster charging: 90W vs 45W
- Higher performance (98/100 vs 32/100)
- Better camera (87/100 vs 30/100)
- Longer battery life (83/100 vs 75/100)
- Better display (81/100 vs 55/100)
- Better portability (42/100 vs 40/100)
Comparing the Realme C100x vs the Xiaomi 17 Ultra (China), the Xiaomi 17 Ultra (China) scores 45 points higher (87/100 vs 42/100). In the "performance" category, the Xiaomi 17 Ultra (China) leads (98/100 vs 32/100). In the "camera" category, the Xiaomi 17 Ultra (China) leads (87/100 vs 30/100). Value score: Realme C100x — 54/100, Xiaomi 17 Ultra (China) — 86/100; it is biased by price level, so it should not be compared directly between devices at different prices. In the "performance" category, the Xiaomi 17 Ultra (China) significantly outperforms the Realme C100x (98/100 vs 32/100). In the "display" category, the Xiaomi 17 Ultra (China) notably outperforms the Realme C100x (81/100 vs 55/100). In the "camera" category, the Xiaomi 17 Ultra (China) significantly outperforms the Realme C100x (87/100 vs 30/100). In the "battery" category, the Xiaomi 17 Ultra (China) is a bit better (83/100 vs 75/100). In the "portability" category, the Xiaomi 17 Ultra (China) and the Realme C100x are nearly equal (42/100 vs 40/100).
| Specification | Realme C100x | Xiaomi 17 Ultra (China) | |
|---|---|---|---|
| Processor | Unisoc T7250 | Snapdragon 8 Elite Gen 5 | |
| AnTuTu | — | 3942923 | |
| Geekbench Single | 600 | 3640 | |
| Geekbench Multi | 1800 | 11033 | |
| Display | 6.8" IPS LCD | 6.9" LTPO AMOLED | |
| Resolution | 720x1570 | 1200x2608 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 8000 mAh | 6800 mAh | |
| Charging | 45W | 90W | |
| Wireless charging | — | 50W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 0 MP | 50 MP | |
| Telephoto | 0 MP | 200 MP | |
| Front camera | 5 MP | 50 MP | |
| RAM | 4GB / 6GB | 12GB / 16GB | |
| Storage | 64GB / 128GB / 256GB | 512GB / 1TB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | 900 nits | — | |
| NFC | yes | yes | |
| Protection | IP64 | IP68/IP69 | |
| Dimensions | — | 162.9×77.6×8.3 mm | |
| Weight | 219 g | 224 g | |
| Launch price | $175 | $892 |
Realme C100x
- Main: 50MP f/f/1.8
- Front: 5MP
Xiaomi 17 Ultra (China)
- Main: 50MP f/f/1.7
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 50MP
Realme C100x
- 6.8" IPS LCD
- Resolution: 720x1570
- Refresh rate: 120 Hz
Xiaomi 17 Ultra (China)
- 6.9" LTPO AMOLED
- Resolution: 1200x2608
- Refresh rate: 120 Hz
Realme C100x
- 8000 mAh
- Wired: 45W
- Wireless charging: no data
Xiaomi 17 Ultra (China)
- 6800 mAh
- Wired: 90W
- Wireless: 50W
Launch price difference: $717. Realme C100x was $717 cheaper at launch.
performance
In the "performance" category, the Xiaomi 17 Ultra (China) significantly outperforms the Realme C100x (98/100 vs 32/100).
display
In the "display" category, the Xiaomi 17 Ultra (China) notably outperforms the Realme C100x (81/100 vs 55/100).
camera
In the "camera" category, the Xiaomi 17 Ultra (China) significantly outperforms the Realme C100x (87/100 vs 30/100).
battery
In the "battery" category, the Xiaomi 17 Ultra (China) is a bit better (83/100 vs 75/100).
portability
In the "portability" category, the Xiaomi 17 Ultra (China) and the Realme C100x are nearly equal (42/100 vs 40/100).
Which is better: the Realme C100x or the Xiaomi 17 Ultra (China)?
The Xiaomi 17 Ultra (China) significantly outperforms the Realme C100x by 45 points (87/100 vs 42/100).
What is the rating of the Realme C100x and the Xiaomi 17 Ultra (China)?
The Realme C100x has a MobileRank rating of 42/100, the Xiaomi 17 Ultra (China) — 87/100.
Which has the better camera: the Realme C100x or the Xiaomi 17 Ultra (China)?
The Xiaomi 17 Ultra (China) leads on camera score (87/100 vs 30/100).
Which is more powerful: the Realme C100x or the Xiaomi 17 Ultra (China)?
The Xiaomi 17 Ultra (China) leads on performance (98/100 vs 32/100).
Should you choose the Realme C100x over the Xiaomi 17 Ultra (China)?
The Realme C100x is a better fit for those who care about battery life. The Xiaomi 17 Ultra (China) is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life, budget-conscious buyers.