Realme C100x vs Vivo iQOO 15 Ultra
Comparing the Realme C100x (2026) and the Vivo iQOO 15 Ultra (2026) on specs and benchmarks. By overall MobileRank rating, the Vivo iQOO 15 Ultra leads — 84/100 vs 31/100 (a 53-point difference). Key differences: the Realme C100x has the bigger battery (7500 mAh vs 7400).
Realme C100x
Vivo iQOO 15 Ultra
- Bigger battery: 7500 vs 7400 mAh
- Better design/ergonomics (50/100 vs 16/100)
- Higher refresh rate: 144Hz vs 120Hz
- Higher performance (97/100 vs 0/100)
- Better camera (74/100 vs 24/100)
- Longer battery life (86/100 vs 52/100)
Comparing the Realme C100x vs the Vivo iQOO 15 Ultra, the Vivo iQOO 15 Ultra scores 53 points higher (84/100 vs 31/100). In the "performance" category, the Vivo iQOO 15 Ultra leads (97/100 vs 0/100). In the "camera" category, the Vivo iQOO 15 Ultra leads (74/100 vs 24/100). In the "battery" category, the Vivo iQOO 15 Ultra leads (86/100 vs 52/100). In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C100x (97/100 vs 0/100). In the "display" category, both devices are on the same level — 100/100. In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C100x (74/100 vs 24/100). In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C100x (86/100 vs 52/100). In the "design" category, the Realme C100x significantly outperforms the Vivo iQOO 15 Ultra (50/100 vs 16/100). In the "value for money" category, both devices are on the same level — 55/100.
| Specification | Realme C100x | Vivo iQOO 15 Ultra | |
|---|---|---|---|
| Processor | — | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | — | 4602290 | |
| Geekbench Single | — | 3640 | |
| Geekbench Multi | — | 11033 | |
| Display | 6.8" IPS LCD | 6.8" LTPO AMOLED | |
| Resolution | 720x1640 | 1440x3168 | |
| Refresh rate | 120 Hz | 144 Hz | |
| Battery | 7500 mAh | 7400 mAh | |
| Charging | — | 120W | |
| Wireless charging | 0W | 50W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 0 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 5 MP | 32 MP | |
| RAM | 4GB | 12GB / 16GB / 24GB | |
| Storage | 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | — | 8000 nits | |
| NFC | yes | yes | |
| Protection | IP64 | IP68 | |
| Dimensions | — | 163.7×76.8×8.7 mm | |
| Weight | — | 227 g | |
| Price | — | $799 |
Realme C100x
- Main: 50MP f/f/1.8
- Front: 5MP
Vivo iQOO 15 Ultra
- Main: 50MP f/f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Realme C100x
- 6.8" IPS LCD
- Resolution: 720x1640
- Refresh rate: 120 Hz
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Realme C100x
- 7500 mAh
- No wireless charging
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
Realme C100x
Price unknownperformance
In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C100x (97/100 vs 0/100).
display
In the "display" category, both devices are on the same level — 100/100.
camera
In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C100x (74/100 vs 24/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C100x (86/100 vs 52/100).
design
In the "design" category, the Realme C100x significantly outperforms the Vivo iQOO 15 Ultra (50/100 vs 16/100).
value for money
In the "value for money" category, both devices are on the same level — 55/100.
Which is better: the Realme C100x or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra significantly outperforms the Realme C100x by 53 points (84/100 vs 31/100).
What is the rating of the Realme C100x and the Vivo iQOO 15 Ultra?
The Realme C100x has a MobileRank rating of 31/100, the Vivo iQOO 15 Ultra — 84/100.
Which has the better camera: the Realme C100x or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on camera score (74/100 vs 24/100).
Which is more powerful: the Realme C100x or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on performance (97/100 vs 0/100).
Should you choose the Realme C100x over the Vivo iQOO 15 Ultra?
The Realme C100x is a better fit for everyday use. The Vivo iQOO 15 Ultra is a better fit for gamers and power users, those who care about battery life.