Realme C100x vs Samsung Galaxy S25 Ultra
Comparing the Realme C100x (2026) and the Samsung Galaxy S25 Ultra (2025) on specs and benchmarks. By overall MobileRank rating, the Samsung Galaxy S25 Ultra leads — 66/100 vs 31/100 (a 35-point difference). Key differences: the Realme C100x has the bigger battery (7500 mAh vs 5000); the main camera is 50 MP vs 200 MP.
Realme C100x
Samsung Galaxy S25 Ultra
- Bigger battery: 7500 vs 5000 mAh
- Longer battery life (52/100 vs 45/100)
- Better design/ergonomics (50/100 vs 27/100)
- Better value for money (55/100 vs 20/100)
- Better main camera: 200MP vs 50MP
- Higher performance (67/100 vs 0/100)
- Better camera (81/100 vs 24/100)
Comparing the Realme C100x vs the Samsung Galaxy S25 Ultra, the Samsung Galaxy S25 Ultra scores 35 points higher (66/100 vs 31/100). In the "performance" category, the Samsung Galaxy S25 Ultra leads (67/100 vs 0/100). In the "camera" category, the Samsung Galaxy S25 Ultra leads (81/100 vs 24/100). In the "value for money" category, the Realme C100x leads (55/100 vs 20/100). In the "performance" category, the Samsung Galaxy S25 Ultra significantly outperforms the Realme C100x (67/100 vs 0/100). In the "display" category, both devices are on the same level — 100/100. In the "camera" category, the Samsung Galaxy S25 Ultra significantly outperforms the Realme C100x (81/100 vs 24/100). In the "battery" category, the Realme C100x is a bit better (52/100 vs 45/100). In the "design" category, the Realme C100x notably outperforms the Samsung Galaxy S25 Ultra (50/100 vs 27/100). In the "value for money" category, the Realme C100x significantly outperforms the Samsung Galaxy S25 Ultra (55/100 vs 20/100).
| Specification | Realme C100x | Samsung Galaxy S25 Ultra | |
|---|---|---|---|
| Processor | — | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | — | 2800202 | |
| Geekbench Single | — | 3100 | |
| Geekbench Multi | — | 9760 | |
| Display | 6.8" IPS LCD | 6.9" Dynamic AMOLED 2X | |
| Resolution | 720x1640 | 3120x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 7500 mAh | 5000 mAh | |
| Charging | — | 45W | |
| Wireless charging | 0W | 15W | |
| DXOMark (camera) | — | 151 | |
| Main camera | 50 MP | 200 MP | |
| Ultrawide | 0 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 5 MP | 12 MP | |
| RAM | 4GB | 12GB / 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 15 / One UI 7 | |
| Brightness (peak) | — | 2600 nits | |
| NFC | yes | yes | |
| Protection | IP64 | IP68 | |
| Dimensions | — | 162.8×77.6×8.2 mm | |
| Weight | — | 218 g | |
| Price | — | $1299 |
Realme C100x
- Main: 50MP f/f/1.8
- Front: 5MP
Samsung Galaxy S25 Ultra
- Main: 200MP f/f/1.7
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 12MP
Realme C100x
- 6.8" IPS LCD
- Resolution: 720x1640
- Refresh rate: 120 Hz
Samsung Galaxy S25 Ultra
- 6.9" Dynamic AMOLED 2X
- Resolution: 3120x1440
- Refresh rate: 120 Hz
Realme C100x
- 7500 mAh
- No wireless charging
Samsung Galaxy S25 Ultra
- 5000 mAh
- NanoReview test: web browsing 11:10 hrs, total 28:43 hrs
- Wired: 45W
- Wireless: 15W
Realme C100x
Price unknownperformance
In the "performance" category, the Samsung Galaxy S25 Ultra significantly outperforms the Realme C100x (67/100 vs 0/100).
display
In the "display" category, both devices are on the same level — 100/100.
camera
In the "camera" category, the Samsung Galaxy S25 Ultra significantly outperforms the Realme C100x (81/100 vs 24/100).
battery
In the "battery" category, the Realme C100x is a bit better (52/100 vs 45/100).
design
In the "design" category, the Realme C100x notably outperforms the Samsung Galaxy S25 Ultra (50/100 vs 27/100).
value for money
In the "value for money" category, the Realme C100x significantly outperforms the Samsung Galaxy S25 Ultra (55/100 vs 20/100).
Which is better: the Realme C100x or the Samsung Galaxy S25 Ultra?
The Samsung Galaxy S25 Ultra significantly outperforms the Realme C100x by 35 points (66/100 vs 31/100).
What is the rating of the Realme C100x and the Samsung Galaxy S25 Ultra?
The Realme C100x has a MobileRank rating of 31/100, the Samsung Galaxy S25 Ultra — 66/100.
Which has the better camera: the Realme C100x or the Samsung Galaxy S25 Ultra?
The Samsung Galaxy S25 Ultra leads on camera score (81/100 vs 24/100).
Which is more powerful: the Realme C100x or the Samsung Galaxy S25 Ultra?
The Samsung Galaxy S25 Ultra leads on performance (67/100 vs 0/100).
Should you choose the Realme C100x over the Samsung Galaxy S25 Ultra?
The Realme C100x is a better fit for everyday use. The Samsung Galaxy S25 Ultra is a better fit for active users, mobile photography enthusiasts.