Realme C51s vs Vivo iQOO 15 Ultra
The Realme C51s (2024) 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 — 89/100 vs 32/100 (a 57-point difference). Key differences: the Vivo iQOO 15 Ultra has the bigger battery (7400 mAh vs 5000); the Realme C51s is noticeably lighter (182g vs 227g).
Profile comparison
Category scores
Realme C51s
Vivo iQOO 15 Ultra
What makes Realme C51s better?
- Lighter: 182g vs 227g
- Better portability (75/100 vs 35/100)
What makes Vivo iQOO 15 Ultra better?
- Better Geekbench Single: 3639 vs 360
- Better Geekbench Multi: 11047 vs 1250
- Bigger battery: 7400 vs 5000 mAh
- Faster charging: 120W vs 33W
- Higher refresh rate: 144Hz vs 90Hz
- Higher performance (99/100 vs 16/100)
- Longer battery life (92/100 vs 46/100)
- Better display (99/100 vs 43/100)
Comparison verdict
Comparing the Realme C51s vs the Vivo iQOO 15 Ultra, the Vivo iQOO 15 Ultra scores 57 points higher (89/100 vs 32/100). In the "performance" category, the Vivo iQOO 15 Ultra leads (99/100 vs 16/100). In the "battery" category, the Vivo iQOO 15 Ultra leads (92/100 vs 46/100). In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C51s (99/100 vs 16/100). In the "display" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C51s (99/100 vs 43/100). In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C51s (92/100 vs 46/100). In the "portability" category, the Realme C51s significantly outperforms the Vivo iQOO 15 Ultra (75/100 vs 35/100).
Specs comparison
| Specification | Realme C51s | Vivo iQOO 15 Ultra | |
|---|---|---|---|
| Processor | Unisoc Tiger T612 | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | — | 4602290 | |
| Geekbench Single | 360 | 3639 | |
| Geekbench Multi | 1250 | 11047 | |
| 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 | |
| Ultrawide | 0 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 5 MP | 32 MP | |
| RAM | 6GB | 12GB / 16GB / 24GB | |
| Storage | 128GB | 256GB / 512GB / 1TB | |
| OS | Android 13, Realme UI | Android 16 | |
| Brightness (peak) | 560 nits | 8000 nits | |
| NFC | yes | yes | |
| Protection | IP54 | IP68 | |
| Dimensions | 167.2×76.7×7.5 mm | 163.7×76.8×8.7 mm | |
| Weight | 182 g | 227 g | |
| Launch price | — | $799 |
Camera comparison
Realme C51s
- Main: —
- Front: 5MP
Vivo iQOO 15 Ultra
- Main: 50MP f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Display comparison
Realme C51s
- 6.7" IPS LCD
- Resolution: 720x1600
- Refresh rate: 90 Hz
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Battery and charging
Realme C51s
- 5000 mAh
- Wired: 33W
- No wireless charging
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
Benchmarks
Launch prices and where to check today's
Realme C51s
Price unknownDetailed category analysis
performance
In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C51s (99/100 vs 16/100).
display
In the "display" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C51s (99/100 vs 43/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Realme C51s (92/100 vs 46/100).
portability
In the "portability" category, the Realme C51s significantly outperforms the Vivo iQOO 15 Ultra (75/100 vs 35/100).
Frequently asked questions
Which is better: the Realme C51s or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra significantly outperforms the Realme C51s by 57 points (89/100 vs 32/100).
What is the rating of the Realme C51s and the Vivo iQOO 15 Ultra?
The Realme C51s has a MobileRank rating of 32/100, the Vivo iQOO 15 Ultra — 89/100.
Which is more powerful: the Realme C51s or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on performance (99/100 vs 16/100).
Should you choose the Realme C51s 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.