Realme C100x vs Vivo X300 Ultra
Comparing the Realme C100x (2026) and the Vivo X300 Ultra (2026) on specs and benchmarks. By overall MobileRank rating, the Vivo X300 Ultra leads — 87/100 vs 31/100 (a 56-point difference). Key differences: the Realme C100x has the bigger battery (7500 mAh vs 7000); the main camera is 50 MP vs 200 MP.
Realme C100x
Vivo X300 Ultra
- Bigger battery: 7500 vs 7000 mAh
- Better design/ergonomics (50/100 vs 12/100)
- Better value for money (55/100 vs 44/100)
- Better main camera: 200MP vs 50MP
- Higher performance (96/100 vs 0/100)
- Better camera (96/100 vs 24/100)
- Longer battery life (77/100 vs 52/100)
Comparing the Realme C100x vs the Vivo X300 Ultra, the Vivo X300 Ultra scores 56 points higher (87/100 vs 31/100). In the "performance" category, the Vivo X300 Ultra leads (96/100 vs 0/100). In the "camera" category, the Vivo X300 Ultra leads (96/100 vs 24/100). In the "battery" category, the Vivo X300 Ultra leads (77/100 vs 52/100). In the "value for money" category, the Realme C100x leads (55/100 vs 44/100). In the "performance" category, the Vivo X300 Ultra significantly outperforms the Realme C100x (96/100 vs 0/100). In the "display" category, both devices are on the same level — 100/100. In the "camera" category, the Vivo X300 Ultra significantly outperforms the Realme C100x (96/100 vs 24/100). In the "battery" category, the Vivo X300 Ultra notably outperforms the Realme C100x (77/100 vs 52/100). In the "design" category, the Realme C100x significantly outperforms the Vivo X300 Ultra (50/100 vs 12/100). In the "value for money" category, the Realme C100x is a bit better (55/100 vs 44/100).
| Specification | Realme C100x | Vivo X300 Ultra | |
|---|---|---|---|
| Processor | — | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | — | 4247433 | |
| Geekbench Single | — | 3640 | |
| Geekbench Multi | — | 11033 | |
| Display | 6.8" IPS LCD | 6.8" LTPO OLED | |
| Resolution | 720x1640 | 3168x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 7500 mAh | 7000 mAh | |
| Charging | — | 100W | |
| Wireless charging | 0W | 40W | |
| DXOMark (camera) | — | 170 | |
| Main camera | 50 MP | 200 MP | |
| Ultrawide | 0 MP | 50 MP | |
| Telephoto | 0 MP | 200 MP | |
| Front camera | 5 MP | 32 MP | |
| RAM | 4GB | 12GB / 16GB | |
| Storage | 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 16 | |
| NFC | yes | yes | |
| Protection | IP64 | IP69 | |
| Dimensions | — | 163.0×76.8×8.2 mm | |
| Weight | — | 230 g | |
| Price | — | $950 |
Realme C100x
- Main: 50MP f/f/1.8
- Front: 5MP
Vivo X300 Ultra
- Main: 200MP f/f/1.6
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 32MP
Realme C100x
- 6.8" IPS LCD
- Resolution: 720x1640
- Refresh rate: 120 Hz
Vivo X300 Ultra
- 6.8" LTPO OLED
- Resolution: 3168x1440
- Refresh rate: 120 Hz
Realme C100x
- 7500 mAh
- No wireless charging
Vivo X300 Ultra
- 7000 mAh
- NanoReview test: web browsing 10:18 hrs, total 29:11 hrs
- Wired: 100W
- Wireless: 40W
Realme C100x
Price unknownperformance
In the "performance" category, the Vivo X300 Ultra significantly outperforms the Realme C100x (96/100 vs 0/100).
display
In the "display" category, both devices are on the same level — 100/100.
camera
In the "camera" category, the Vivo X300 Ultra significantly outperforms the Realme C100x (96/100 vs 24/100).
battery
In the "battery" category, the Vivo X300 Ultra notably outperforms the Realme C100x (77/100 vs 52/100).
design
In the "design" category, the Realme C100x significantly outperforms the Vivo X300 Ultra (50/100 vs 12/100).
value for money
In the "value for money" category, the Realme C100x is a bit better (55/100 vs 44/100).
Which is better: the Realme C100x or the Vivo X300 Ultra?
The Vivo X300 Ultra significantly outperforms the Realme C100x by 56 points (87/100 vs 31/100).
What is the rating of the Realme C100x and the Vivo X300 Ultra?
The Realme C100x has a MobileRank rating of 31/100, the Vivo X300 Ultra — 87/100.
Which has the better camera: the Realme C100x or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on camera score (96/100 vs 24/100).
Which is more powerful: the Realme C100x or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on performance (96/100 vs 0/100).
Should you choose the Realme C100x over the Vivo X300 Ultra?
The Realme C100x is a better fit for everyday use. The Vivo X300 Ultra is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life.