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 — 84/100 vs 31/100 (a 53-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 358,383); the Vivo iQOO 15 Ultra has NFC for contactless payments, the Realme C75x doesn't; the Realme C75x is noticeably lighter (196g vs 227g).
Realme C75x
Vivo iQOO 15 Ultra
- Lighter: 196g vs 227g
- Better design/ergonomics (55/100 vs 16/100)
- Higher AnTuTu: 4602290 vs 358383
- Better Geekbench Single: 3640 vs 432
- Better Geekbench Multi: 11033 vs 1416
- Bigger battery: 7400 vs 5600 mAh
- Faster charging: 120W vs 45W
- 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 50/100)
Comparing the Realme C75x 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 50/100). In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C75x (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 C75x (74/100 vs 24/100). In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C75x (86/100 vs 50/100). In the "design" category, the Realme C75x significantly outperforms the Vivo iQOO 15 Ultra (55/100 vs 16/100). In the "value for money" category, both devices are on the same level — 55/100.
| Specification | Realme C75x | Vivo iQOO 15 Ultra | |
|---|---|---|---|
| Processor | MediaTek Helio G81 Ultra | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 358383 | 4602290 | |
| Geekbench Single | 432 | 3640 | |
| Geekbench Multi | 1416 | 11033 | |
| 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 | |
| Price | — | $799 |
Realme C75x
- 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 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
Realme C75x
- 5600 mAh
- Wired: 45W
- No wireless charging
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
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.
Realme C75x
Price unknownperformance
In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C75x (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 C75x (74/100 vs 24/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C75x (86/100 vs 50/100).
design
In the "design" category, the Realme C75x significantly outperforms the Vivo iQOO 15 Ultra (55/100 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 C75x or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra significantly outperforms the Realme C75x by 53 points (84/100 vs 31/100).
What is the rating of the Realme C75x and the Vivo iQOO 15 Ultra?
The Realme C75x has a MobileRank rating of 31/100, the Vivo iQOO 15 Ultra — 84/100.
Which has the better camera: the Realme C75x 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 C75x or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on performance (97/100 vs 0/100).
Should you choose the Realme C75x over the Vivo iQOO 15 Ultra?
The Realme C75x 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.