Realme C75x vs Vivo iQOO 15 Ultra
The Realme C75x (2025) runs on the MediaTek Helio G81 Ultra, while the Vivo iQOO 15 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5. By overall MobileRank rating, the Vivo iQOO 15 Ultra leads — 89/100 vs 39/100 (a 50-point difference). Key differences: the Vivo iQOO 15 Ultra has the bigger battery (7400 mAh vs 5600); the Vivo iQOO 15 Ultra is faster in AnTuTu (4,602,290 vs 358,608); the Vivo iQOO 15 Ultra has NFC for contactless payments, the Realme C75x doesn't; the Realme C75x is noticeably lighter (196g vs 227g).
Profile comparison
Category scores
Realme C75x
Vivo iQOO 15 Ultra
What makes Realme C75x better?
- Lighter: 196g vs 227g
- Better portability (62/100 vs 35/100)
What makes Vivo iQOO 15 Ultra better?
- Higher AnTuTu: 4602290 vs 358608
- Better Geekbench Single: 3639 vs 432
- Better Geekbench Multi: 11047 vs 1416
- Bigger battery: 7400 vs 5600 mAh
- Faster charging: 120W vs 45W
- Higher refresh rate: 144Hz vs 120Hz
- Higher performance (99/100 vs 30/100)
- Better camera (78/100 vs 30/100)
- Longer battery life (92/100 vs 55/100)
- Better display (99/100 vs 55/100)
Comparison verdict
Comparing the Realme C75x vs the Vivo iQOO 15 Ultra, the Vivo iQOO 15 Ultra scores 50 points higher (89/100 vs 39/100). In the "performance" category, the Vivo iQOO 15 Ultra leads (99/100 vs 30/100). 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 55/100). In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C75x (99/100 vs 30/100). In the "display" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C75x (99/100 vs 55/100). In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C75x (78/100 vs 30/100). In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C75x (92/100 vs 55/100). In the "portability" category, the Realme C75x notably outperforms the Vivo iQOO 15 Ultra (62/100 vs 35/100).
Specs comparison
| Specification | Realme C75x | Vivo iQOO 15 Ultra | |
|---|---|---|---|
| Processor | MediaTek Helio G81 Ultra | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 358608 | 4602290 | |
| Geekbench Single | 432 | 3639 | |
| Geekbench Multi | 1416 | 11047 | |
| Display | 6.7" IPS LCD | 6.8" LTPO AMOLED | |
| Resolution | 720x1604 | 1440x3168 | |
| Refresh rate | 120 Hz | 144 Hz | |
| Battery | 5600 mAh | 7400 mAh | |
| Charging | 45W | 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 | 8GB | 12GB / 16GB / 24GB | |
| Storage | 128GB | 256GB / 512GB / 1TB | |
| OS | Android 15, Realme UI 6.0 | Android 16 | |
| Brightness (peak) | 625 nits | 8000 nits | |
| NFC | no | yes | |
| Protection | IP68 | IP68 | |
| Dimensions | 165.7×76.2×8.0 mm | 163.7×76.8×8.7 mm | |
| Weight | 196 g | 227 g | |
| Launch price | — | $799 |
Camera comparison
Realme C75x
- 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 C75x
- 6.7" IPS LCD
- Resolution: 720x1604
- Refresh rate: 120 Hz
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Battery and charging
Realme C75x
- 5600 mAh
- Wired: 45W
- No wireless charging
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
Overall performance score
We compared Realme C75x and Vivo iQOO 15 Ultra, covering their specs and all relevant benchmarks.
Vivo iQOO 15 Ultra leads Realme C75x by 92.2% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Realme C75x
Price unknownDetailed category analysis
performance
In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C75x (99/100 vs 30/100).
display
In the "display" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C75x (99/100 vs 55/100).
camera
In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C75x (78/100 vs 30/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C75x (92/100 vs 55/100).
portability
In the "portability" category, the Realme C75x notably outperforms the Vivo iQOO 15 Ultra (62/100 vs 35/100).
Frequently asked questions
Which is better: the Realme C75x or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra significantly outperforms the Realme C75x by 50 points (89/100 vs 39/100).
What is the rating of the Realme C75x and the Vivo iQOO 15 Ultra?
The Realme C75x has a MobileRank rating of 39/100, the Vivo iQOO 15 Ultra — 89/100.
Which has the better camera: the Realme C75x 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 C75x or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on performance (99/100 vs 30/100).
Should you choose the Realme C75x over the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.