Realme C100x vs Vivo iQOO 15 Ultra
The Realme C100x (2026) runs on the Unisoc T7250, while the Vivo iQOO 15 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5; launch prices were $175 and $799. By overall MobileRank rating, the Vivo iQOO 15 Ultra leads — 89/100 vs 42/100 (a 47-point difference). Key differences: the Realme C100x has the bigger battery (8000 mAh vs 7400).
Profile comparison
Category scores
Realme C100x
Vivo iQOO 15 Ultra
What makes Realme C100x better?
- Bigger battery: 8000 vs 7400 mAh
- Lighter: 219g vs 227g
- Cheaper at launch: $175 vs $799
- Better portability (40/100 vs 35/100)
What makes Vivo iQOO 15 Ultra better?
- Better Geekbench Single: 3639 vs 600
- Better Geekbench Multi: 11047 vs 1800
- Faster charging: 120W vs 45W
- Higher refresh rate: 144Hz vs 120Hz
- Higher performance (99/100 vs 32/100)
- Better camera (78/100 vs 30/100)
- Longer battery life (92/100 vs 75/100)
- Better display (99/100 vs 55/100)
Comparison verdict
Comparing the Realme C100x vs the Vivo iQOO 15 Ultra, the Vivo iQOO 15 Ultra scores 47 points higher (89/100 vs 42/100). In the "performance" category, the Vivo iQOO 15 Ultra leads (99/100 vs 32/100). In the "camera" category, the Vivo iQOO 15 Ultra leads (78/100 vs 30/100). In the "battery" category, the Vivo iQOO 15 Ultra leads (92/100 vs 75/100). Value score: Realme C100x — 52/100, Vivo iQOO 15 Ultra — 92/100; 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 iQOO 15 Ultra significantly outperforms the Realme C100x (99/100 vs 32/100). In the "display" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C100x (99/100 vs 55/100). In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C100x (78/100 vs 30/100). In the "battery" category, the Vivo iQOO 15 Ultra notably outperforms the Realme C100x (92/100 vs 75/100). In the "portability" category, the Realme C100x is a bit better (40/100 vs 35/100).
Specs comparison
| Specification | Realme C100x | Vivo iQOO 15 Ultra | |
|---|---|---|---|
| Processor | Unisoc T7250 | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | — | 4602290 | |
| Geekbench Single | 600 | 3639 | |
| Geekbench Multi | 1800 | 11047 | |
| Display | 6.8" IPS LCD | 6.8" LTPO AMOLED | |
| Resolution | 720x1570 | 1440x3168 | |
| Refresh rate | 120 Hz | 144 Hz | |
| Battery | 8000 mAh | 7400 mAh | |
| Charging | 45W | 120W | |
| Wireless charging | — | 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 / 6GB | 12GB / 16GB / 24GB | |
| Storage | 64GB / 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | 900 nits | 8000 nits | |
| NFC | yes | yes | |
| Protection | IP64 | IP68 | |
| Dimensions | — | 163.7×76.8×8.7 mm | |
| Weight | 219 g | 227 g | |
| Launch price | $175 | $799 |
Camera comparison
Realme C100x
- Main: 50MP f/1.8
- Front: 5MP
Vivo iQOO 15 Ultra
- Main: 50MP f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Display comparison
Realme C100x
- 6.8" IPS LCD
- Resolution: 720x1570
- Refresh rate: 120 Hz
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Battery and charging
Realme C100x
- 8000 mAh
- Wired: 45W
- Wireless charging: no data
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
Benchmarks
Launch prices and where to check today's
Launch price difference: $624. Realme C100x was $624 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C100x (99/100 vs 32/100).
display
In the "display" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C100x (99/100 vs 55/100).
camera
In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C100x (78/100 vs 30/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra notably outperforms the Realme C100x (92/100 vs 75/100).
portability
In the "portability" category, the Realme C100x is a bit better (40/100 vs 35/100).
Frequently asked questions
Which is better: the Realme C100x or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra significantly outperforms the Realme C100x by 47 points (89/100 vs 42/100).
What is the rating of the Realme C100x and the Vivo iQOO 15 Ultra?
The Realme C100x has a MobileRank rating of 42/100, the Vivo iQOO 15 Ultra — 89/100.
Which has the better camera: the Realme C100x or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on camera score (78/100 vs 30/100).
Which is more powerful: the Realme C100x or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on performance (99/100 vs 32/100).
Should you choose the Realme C100x over the Vivo iQOO 15 Ultra?
The Realme C100x is a better fit for those who care about battery life. The Vivo iQOO 15 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.