Realme C51 vs Vivo iQOO 15 Ultra
The Realme C51 (2023) runs on the Unisoc Tiger T612, 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 23/100 (a 61-point difference). Key differences: the Vivo iQOO 15 Ultra has the bigger battery (7400 mAh vs 5000); the Vivo iQOO 15 Ultra is faster in AnTuTu (4,602,290 vs 200,000); the Realme C51 is noticeably lighter (186g vs 227g).
Realme C51
Vivo iQOO 15 Ultra
- Lighter: 186g vs 227g
- Better design/ergonomics (67/100 vs 16/100)
- Higher AnTuTu: 4602290 vs 200000
- Better Geekbench Single: 3640 vs 360
- Better Geekbench Multi: 11033 vs 1250
- Bigger battery: 7400 vs 5000 mAh
- Faster charging: 120W vs 33W
- Higher refresh rate: 144Hz vs 90Hz
- Higher performance (97/100 vs 0/100)
- Better camera (74/100 vs 24/100)
- Longer battery life (86/100 vs 39/100)
- Better display (100/100 vs 50/100)
Comparing the Realme C51 vs the Vivo iQOO 15 Ultra, the Vivo iQOO 15 Ultra scores 61 points higher (84/100 vs 23/100). 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 39/100). In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C51 (97/100 vs 0/100). In the "display" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C51 (100/100 vs 50/100). In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C51 (74/100 vs 24/100). In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C51 (86/100 vs 39/100). In the "design" category, the Realme C51 significantly outperforms the Vivo iQOO 15 Ultra (67/100 vs 16/100). In the "value for money" category, both devices are on the same level — 55/100.
| Specification | Realme C51 | Vivo iQOO 15 Ultra | |
|---|---|---|---|
| Processor | Unisoc Tiger T612 | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 200000 | 4602290 | |
| Geekbench Single | 360 | 3640 | |
| Geekbench Multi | 1250 | 11033 | |
| Display | 6.7" IPS LCD | 6.8" LTPO AMOLED | |
| Resolution | 720x1600 | 1440x3168 | |
| Refresh rate | 90 Hz | 144 Hz | |
| Battery | 5000 mAh | 7400 mAh | |
| Charging | 33W | 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 | 64GB / 128GB | 256GB / 512GB / 1TB | |
| OS | Android 13, Realme UI T | Android 16 | |
| Brightness (peak) | 560 nits | 8000 nits | |
| NFC | yes | yes | |
| Protection | — | IP68 | |
| Dimensions | 167.2×76.7×8.0 mm | 163.7×76.8×8.7 mm | |
| Weight | 186 g | 227 g | |
| Price | — | $799 |
Realme C51
- 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 C51
- 6.7" IPS LCD
- Resolution: 720x1600
- Refresh rate: 90 Hz
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Realme C51
- 5000 mAh
- Wired: 33W
- No wireless charging
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
We compared Realme C51 and Vivo iQOO 15 Ultra, covering their specs and all relevant benchmarks.
Vivo iQOO 15 Ultra leads Realme C51 by 95.7% in our overall performance rating.
Realme C51
Price unknownperformance
In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C51 (97/100 vs 0/100).
display
In the "display" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C51 (100/100 vs 50/100).
camera
In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C51 (74/100 vs 24/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C51 (86/100 vs 39/100).
design
In the "design" category, the Realme C51 significantly outperforms the Vivo iQOO 15 Ultra (67/100 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 C51 or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra significantly outperforms the Realme C51 by 61 points (84/100 vs 23/100).
What is the rating of the Realme C51 and the Vivo iQOO 15 Ultra?
The Realme C51 has a MobileRank rating of 23/100, the Vivo iQOO 15 Ultra — 84/100.
Which has the better camera: the Realme C51 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 C51 or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on performance (97/100 vs 0/100).
Should you choose the Realme C51 over the Vivo iQOO 15 Ultra?
The Realme C51 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.