Realme C100x vs Vivo X300 Ultra
The Realme C100x (2026) runs on the Unisoc T7250, while the Vivo X300 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5; launch prices were $175 and $950. By overall MobileRank rating, the Vivo X300 Ultra leads — 91/100 vs 42/100 (a 49-point difference). Key differences: the Realme C100x has the bigger battery (8000 mAh vs 7000); the main camera is 50 MP vs 200 MP.
Profile comparison
Category scores
Realme C100x
Vivo X300 Ultra
What makes Realme C100x better?
- Bigger battery: 8000 vs 7000 mAh
- Lighter: 219g vs 230g
- Cheaper at launch: $175 vs $950
- Better portability (40/100 vs 39/100)
What makes Vivo X300 Ultra better?
- Better Geekbench Single: 3639 vs 600
- Better Geekbench Multi: 11047 vs 1800
- Faster charging: 100W vs 45W
- Better main camera: 200MP vs 50MP
- Higher performance (99/100 vs 32/100)
- Better camera (96/100 vs 30/100)
- Longer battery life (85/100 vs 75/100)
- Better display (89/100 vs 55/100)
Comparison verdict
Comparing the Realme C100x vs the Vivo X300 Ultra, the Vivo X300 Ultra scores 49 points higher (91/100 vs 42/100). In the "performance" category, the Vivo X300 Ultra leads (99/100 vs 32/100). In the "camera" category, the Vivo X300 Ultra leads (96/100 vs 30/100). In the "battery" category, the Vivo X300 Ultra leads (85/100 vs 75/100). Value score: Realme C100x — 52/100, Vivo X300 Ultra — 94/100; it shows how far a model sits above or below the usual level for its price, and is not part of the overall rating. In the "performance" category, the Vivo X300 Ultra significantly outperforms the Realme C100x (99/100 vs 32/100). In the "display" category, the Vivo X300 Ultra significantly outperforms the Realme C100x (89/100 vs 55/100). In the "camera" category, the Vivo X300 Ultra significantly outperforms the Realme C100x (96/100 vs 30/100). In the "battery" category, the Vivo X300 Ultra is a bit better (85/100 vs 75/100). In the "portability" category, the Realme C100x and the Vivo X300 Ultra are nearly equal (40/100 vs 39/100).
Specs comparison
| Specification | Realme C100x | Vivo X300 Ultra | |
|---|---|---|---|
| Processor | Unisoc T7250 | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | — | 4247433 | |
| Geekbench Single | 600 | 3639 | |
| Geekbench Multi | 1800 | 11047 | |
| Display | 6.8" IPS LCD | 6.8" LTPO OLED | |
| Resolution | 720x1570 | 3168x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 8000 mAh | 7000 mAh | |
| Charging | 45W | 100W | |
| Wireless charging | — | 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 / 6GB | 12GB / 16GB | |
| Storage | 64GB / 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | 900 nits | — | |
| NFC | yes | yes | |
| Protection | IP64 | IP69 | |
| Dimensions | — | 163.0×76.8×8.2 mm | |
| Weight | 219 g | 230 g | |
| Launch price | $175 | $950 |
Camera comparison
Realme C100x
- Main: 50MP f/1.8
- Front: 5MP
Vivo X300 Ultra
- Main: 200MP f/1.6
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 32MP
Display comparison
Realme C100x
- 6.8" IPS LCD
- Resolution: 720x1570
- Refresh rate: 120 Hz
Vivo X300 Ultra
- 6.8" LTPO OLED
- Resolution: 3168x1440
- Refresh rate: 120 Hz
Battery and charging
Realme C100x
- 8000 mAh
- Wired: 45W
- Wireless charging: no data
Vivo X300 Ultra
- 7000 mAh
- NanoReview test: web browsing 10:18 hrs, total 29:11 hrs
- Wired: 100W
- Wireless: 40W
Benchmarks
Launch prices and where to check today's
Launch price difference: $775. Realme C100x was $775 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Vivo X300 Ultra significantly outperforms the Realme C100x (99/100 vs 32/100).
display
In the "display" category, the Vivo X300 Ultra significantly outperforms the Realme C100x (89/100 vs 55/100).
camera
In the "camera" category, the Vivo X300 Ultra significantly outperforms the Realme C100x (96/100 vs 30/100).
battery
In the "battery" category, the Vivo X300 Ultra is a bit better (85/100 vs 75/100).
portability
In the "portability" category, the Realme C100x and the Vivo X300 Ultra are nearly equal (40/100 vs 39/100).
Frequently asked questions
Which is better: the Realme C100x or the Vivo X300 Ultra?
The Vivo X300 Ultra significantly outperforms the Realme C100x by 49 points (91/100 vs 42/100).
What is the rating of the Realme C100x and the Vivo X300 Ultra?
The Realme C100x has a MobileRank rating of 42/100, the Vivo X300 Ultra — 91/100.
Which has the better camera: the Realme C100x or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on camera score (96/100 vs 30/100).
Which is more powerful: the Realme C100x or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on performance (99/100 vs 32/100).
Should you choose the Realme C100x over the Vivo X300 Ultra?
The Realme C100x is a better fit for those who care about battery life. The Vivo X300 Ultra is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life, budget-conscious buyers.