Realme C100 4G vs Xiaomi 15 Ultra
The Realme C100 4G (2026) runs on the Helio G92 Max, while the Xiaomi 15 Ultra (2025) runs on the Qualcomm Snapdragon 8 Elite; estimated prices are $269 and $999. By overall MobileRank rating, the Xiaomi 15 Ultra leads — 85/100 vs 38/100 (a 47-point difference). Key differences: the Realme C100 4G has the bigger battery (8000 mAh vs 6000); the Xiaomi 15 Ultra is faster in AnTuTu (3,030,376 vs 362,744).
Realme C100 4G
Xiaomi 15 Ultra
- Bigger battery: 8000 vs 6000 mAh
- Lighter: 219g vs 225g
- Cheaper: $269 vs $999
- Better portability (41/100 vs 29/100)
- Higher AnTuTu: 3030376 vs 362744
- Better Geekbench Single: 3050 vs 430
- Better Geekbench Multi: 10200 vs 1375
- Faster charging: 90W vs 15W
- Higher performance (92/100 vs 29/100)
- Better camera (87/100 vs 30/100)
- Longer battery life (80/100 vs 58/100)
- Better display (90/100 vs 55/100)
Comparing the Realme C100 4G vs the Xiaomi 15 Ultra, the Xiaomi 15 Ultra scores 47 points higher (85/100 vs 38/100). In the "performance" category, the Xiaomi 15 Ultra leads (92/100 vs 29/100). In the "camera" category, the Xiaomi 15 Ultra leads (87/100 vs 30/100). In the "battery" category, the Xiaomi 15 Ultra leads (80/100 vs 58/100). In the "performance" category, the Xiaomi 15 Ultra significantly outperforms the Realme C100 4G (92/100 vs 29/100). In the "display" category, the Xiaomi 15 Ultra significantly outperforms the Realme C100 4G (90/100 vs 55/100). In the "camera" category, the Xiaomi 15 Ultra significantly outperforms the Realme C100 4G (87/100 vs 30/100). In the "battery" category, the Xiaomi 15 Ultra notably outperforms the Realme C100 4G (80/100 vs 58/100). In the "portability" category, the Realme C100 4G is a bit better (41/100 vs 29/100).
| Specification | Realme C100 4G | Xiaomi 15 Ultra | |
|---|---|---|---|
| Processor | Helio G92 Max | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 362744 | 3030376 | |
| Geekbench Single | 430 | 3050 | |
| Geekbench Multi | 1375 | 10200 | |
| Display | 6.8" IPS LCD | 6.7" LTPO AMOLED | |
| Resolution | 720x1570 | 3200x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 8000 mAh | 6000 mAh | |
| Charging | 15W | 90W | |
| Wireless charging | 0W | 50W | |
| DXOMark (camera) | — | 159 | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 0 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 8 MP | 32 MP | |
| RAM | 6GB / 8GB | 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | Android 16 / realme UI 7.0 | Android 15 / HyperOS 2 | |
| Brightness (peak) | 1200 nits | 3200 nits | |
| NFC | yes | yes | |
| Protection | IP68/IP69K | IP68 | |
| Dimensions | 166.5×78.2×8.6 mm | 161.3×75.3×9.4 mm | |
| Weight | 219 g | 225 g | |
| Price | $269 | $999 |
Realme C100 4G
- Main: 50MP f/f/1.8
- Front: 8MP
Xiaomi 15 Ultra
- Main: 50MP f/f/1.63
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Realme C100 4G
- 6.8" IPS LCD
- Resolution: 720x1570
- Refresh rate: 120 Hz
Xiaomi 15 Ultra
- 6.7" LTPO AMOLED
- Resolution: 3200x1440
- Refresh rate: 120 Hz
Realme C100 4G
- 8000 mAh
- Wired: 15W
- No wireless charging
Xiaomi 15 Ultra
- 6000 mAh
- NanoReview test: web browsing 12:19 hrs, total 30:03 hrs
- Wired: 90W
- Wireless: 50W
We compared Realme C100 4G and Xiaomi 15 Ultra, covering their specs and all relevant benchmarks.
Xiaomi 15 Ultra leads Realme C100 4G by 88.0% in our overall performance rating.
Price difference: $730. Realme C100 4G is cheaper by $730.
performance
In the "performance" category, the Xiaomi 15 Ultra significantly outperforms the Realme C100 4G (92/100 vs 29/100).
display
In the "display" category, the Xiaomi 15 Ultra significantly outperforms the Realme C100 4G (90/100 vs 55/100).
camera
In the "camera" category, the Xiaomi 15 Ultra significantly outperforms the Realme C100 4G (87/100 vs 30/100).
battery
In the "battery" category, the Xiaomi 15 Ultra notably outperforms the Realme C100 4G (80/100 vs 58/100).
portability
In the "portability" category, the Realme C100 4G is a bit better (41/100 vs 29/100).
Which is better: the Realme C100 4G or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra significantly outperforms the Realme C100 4G by 47 points (85/100 vs 38/100).
What is the rating of the Realme C100 4G and the Xiaomi 15 Ultra?
The Realme C100 4G has a MobileRank rating of 38/100, the Xiaomi 15 Ultra — 85/100.
Which has the better camera: the Realme C100 4G or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra leads on camera score (87/100 vs 30/100).
Which is more powerful: the Realme C100 4G or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra leads on performance (92/100 vs 29/100).
Should you choose the Realme C100 4G over the Xiaomi 15 Ultra?
The Realme C100 4G is a better fit for everyday use. The Xiaomi 15 Ultra is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life.