Realme C75x vs Vivo X300 Ultra
The Realme C75x (2025) runs on the MediaTek Helio G81 Ultra, while the Vivo X300 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5. By overall MobileRank rating, the Vivo X300 Ultra leads — 91/100 vs 39/100 (a 52-point difference). Key differences: the Vivo X300 Ultra has the bigger battery (7000 mAh vs 5600); the main camera is 50 MP vs 200 MP; the Vivo X300 Ultra is faster in AnTuTu (4,247,433 vs 358,383); the Vivo X300 Ultra has NFC for contactless payments, the Realme C75x doesn't; the Realme C75x is noticeably lighter (196g vs 230g).
Realme C75x
Vivo X300 Ultra
- Lighter: 196g vs 230g
- Better portability (62/100 vs 39/100)
- Higher AnTuTu: 4247433 vs 358383
- Better Geekbench Single: 3640 vs 432
- Better Geekbench Multi: 11033 vs 1416
- Bigger battery: 7000 vs 5600 mAh
- Faster charging: 100W vs 45W
- Better main camera: 200MP vs 50MP
- Higher performance (99/100 vs 30/100)
- Better camera (96/100 vs 30/100)
- Longer battery life (85/100 vs 55/100)
- Better display (89/100 vs 55/100)
Comparing the Realme C75x vs the Vivo X300 Ultra, the Vivo X300 Ultra scores 52 points higher (91/100 vs 39/100). In the "performance" category, the Vivo X300 Ultra leads (99/100 vs 30/100). 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 55/100). In the "performance" category, the Vivo X300 Ultra significantly outperforms the Realme C75x (99/100 vs 30/100). In the "display" category, the Vivo X300 Ultra significantly outperforms the Realme C75x (89/100 vs 55/100). In the "camera" category, the Vivo X300 Ultra significantly outperforms the Realme C75x (96/100 vs 30/100). In the "battery" category, the Vivo X300 Ultra significantly outperforms the Realme C75x (85/100 vs 55/100). In the "portability" category, the Realme C75x notably outperforms the Vivo X300 Ultra (62/100 vs 39/100).
| Specification | Realme C75x | Vivo X300 Ultra | |
|---|---|---|---|
| Processor | MediaTek Helio G81 Ultra | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 358383 | 4247433 | |
| Geekbench Single | 432 | 3640 | |
| Geekbench Multi | 1416 | 11033 | |
| Display | 6.7" IPS LCD | 6.8" LTPO OLED | |
| Resolution | 720x1604 | 3168x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 5600 mAh | 7000 mAh | |
| Charging | 45W | 100W | |
| Wireless charging | 0W | 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 | 8GB | 12GB / 16GB | |
| Storage | 128GB | 256GB / 512GB / 1TB | |
| OS | Android 15, Realme UI 6.0 | Android 16 | |
| Brightness (peak) | 625 nits | — | |
| NFC | no | yes | |
| Protection | IP68 | IP69 | |
| Dimensions | 165.7×76.2×8.0 mm | 163.0×76.8×8.2 mm | |
| Weight | 196 g | 230 g | |
| Launch price | — | $950 |
Realme C75x
- Main: 50MP f/f/1.8
- Front: 5MP
Vivo X300 Ultra
- Main: 200MP f/f/1.6
- Ultrawide: 50MP
- Telephoto: 200MP
- Front: 32MP
Realme C75x
- 6.7" IPS LCD
- Resolution: 720x1604
- Refresh rate: 120 Hz
Vivo X300 Ultra
- 6.8" LTPO OLED
- Resolution: 3168x1440
- Refresh rate: 120 Hz
Realme C75x
- 5600 mAh
- Wired: 45W
- No wireless charging
Vivo X300 Ultra
- 7000 mAh
- NanoReview test: web browsing 10:18 hrs, total 29:11 hrs
- Wired: 100W
- Wireless: 40W
We compared Realme C75x and Vivo X300 Ultra, covering their specs and all relevant benchmarks.
Vivo X300 Ultra leads Realme C75x by 91.6% in our overall performance rating.
Realme C75x
Price unknownperformance
In the "performance" category, the Vivo X300 Ultra significantly outperforms the Realme C75x (99/100 vs 30/100).
display
In the "display" category, the Vivo X300 Ultra significantly outperforms the Realme C75x (89/100 vs 55/100).
camera
In the "camera" category, the Vivo X300 Ultra significantly outperforms the Realme C75x (96/100 vs 30/100).
battery
In the "battery" category, the Vivo X300 Ultra significantly outperforms the Realme C75x (85/100 vs 55/100).
portability
In the "portability" category, the Realme C75x notably outperforms the Vivo X300 Ultra (62/100 vs 39/100).
Which is better: the Realme C75x or the Vivo X300 Ultra?
The Vivo X300 Ultra significantly outperforms the Realme C75x by 52 points (91/100 vs 39/100).
What is the rating of the Realme C75x and the Vivo X300 Ultra?
The Realme C75x has a MobileRank rating of 39/100, the Vivo X300 Ultra — 91/100.
Which has the better camera: the Realme C75x or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on camera score (96/100 vs 30/100).
Which is more powerful: the Realme C75x or the Vivo X300 Ultra?
The Vivo X300 Ultra leads on performance (99/100 vs 30/100).
Should you choose the Realme C75x over the Vivo X300 Ultra?
The Realme C75x is a better fit for everyday use. 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.