Redmi Note 4X vs Vivo iQOO 15 Ultra
The Redmi Note 4X (2017) runs on the Qualcomm Snapdragon 625, while the Vivo iQOO 15 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5; launch prices were $160 and $799. By overall MobileRank rating, the Vivo iQOO 15 Ultra leads — 89/100 vs 22/100 (a 67-point difference). Key differences: the Vivo iQOO 15 Ultra has the bigger battery (7400 mAh vs 4100); the main camera is 13 MP vs 50 MP; the Vivo iQOO 15 Ultra is faster in AnTuTu (4,602,290 vs 218,879); the Vivo iQOO 15 Ultra has NFC for contactless payments, the Redmi Note 4X doesn't; the Redmi Note 4X is noticeably lighter (165g vs 227g).
Redmi Note 4X
Vivo iQOO 15 Ultra
- Lighter: 165g vs 227g
- Cheaper at launch: $160 vs $799
- Better portability (74/100 vs 35/100)
- Higher AnTuTu: 4602290 vs 218879
- Better Geekbench Single: 3640 vs 189
- Better Geekbench Multi: 11033 vs 862
- Bigger battery: 7400 vs 4100 mAh
- Better main camera: 50MP vs 13MP
- Higher refresh rate: 144Hz vs 60Hz
- Higher performance (99/100 vs 14/100)
- Better camera (78/100 vs 10/100)
- Longer battery life (92/100 vs 35/100)
- Better display (99/100 vs 32/100)
Comparing the Redmi Note 4X vs the Vivo iQOO 15 Ultra, the Vivo iQOO 15 Ultra scores 67 points higher (89/100 vs 22/100). In the "performance" category, the Vivo iQOO 15 Ultra leads (99/100 vs 14/100). In the "camera" category, the Vivo iQOO 15 Ultra leads (78/100 vs 10/100). In the "battery" category, the Vivo iQOO 15 Ultra leads (92/100 vs 35/100). Value score: Redmi Note 4X — 16/100, Vivo iQOO 15 Ultra — 90/100; it is biased by price level, so it should not be compared directly between devices at different prices. In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi Note 4X (99/100 vs 14/100). In the "display" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi Note 4X (99/100 vs 32/100). In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi Note 4X (78/100 vs 10/100). In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi Note 4X (92/100 vs 35/100). In the "portability" category, the Redmi Note 4X significantly outperforms the Vivo iQOO 15 Ultra (74/100 vs 35/100).
| Specification | Redmi Note 4X | Vivo iQOO 15 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 625 | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 218879 | 4602290 | |
| Geekbench Single | 189 | 3640 | |
| Geekbench Multi | 862 | 11033 | |
| Display | 5.5" IPS LCD | 6.8" LTPO AMOLED | |
| Resolution | — | 1440x3168 | |
| Refresh rate | 60 Hz | 144 Hz | |
| Battery | 4100 mAh | 7400 mAh | |
| Charging | — | 120W | |
| Wireless charging | — | 50W | |
| Main camera | 13 MP | 50 MP | |
| Ultrawide | 0 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 5 MP | 32 MP | |
| RAM | 3GB / 4GB | 12GB / 16GB / 24GB | |
| Storage | 32GB / 64GB | 256GB / 512GB / 1TB | |
| OS | — | Android 16 | |
| Brightness (peak) | — | 8000 nits | |
| NFC | no | yes | |
| Protection | — | IP68 | |
| Dimensions | 151.0×76.0×8.5 mm | 163.7×76.8×8.7 mm | |
| Weight | 165 g | 227 g | |
| Launch price | $160 | $799 |
Redmi Note 4X
- Main: 13MP
- Front: 5MP
Vivo iQOO 15 Ultra
- Main: 50MP f/f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Redmi Note 4X
- 5.5" IPS LCD
- Refresh rate: 60 Hz
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Redmi Note 4X
- 4100 mAh
- Wireless charging: no data
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
We compared Redmi Note 4X and Vivo iQOO 15 Ultra, covering their specs and all relevant benchmarks.
Vivo iQOO 15 Ultra leads Redmi Note 4X by 95.2% in our overall performance rating.
Launch price difference: $639. Redmi Note 4X was $639 cheaper at launch.
performance
In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi Note 4X (99/100 vs 14/100).
display
In the "display" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi Note 4X (99/100 vs 32/100).
camera
In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi Note 4X (78/100 vs 10/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi Note 4X (92/100 vs 35/100).
portability
In the "portability" category, the Redmi Note 4X significantly outperforms the Vivo iQOO 15 Ultra (74/100 vs 35/100).
Which is better: the Redmi Note 4X or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra significantly outperforms the Redmi Note 4X by 67 points (89/100 vs 22/100).
What is the rating of the Redmi Note 4X and the Vivo iQOO 15 Ultra?
The Redmi Note 4X has a MobileRank rating of 22/100, the Vivo iQOO 15 Ultra — 89/100.
Which has the better camera: the Redmi Note 4X or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on camera score (78/100 vs 10/100).
Which is more powerful: the Redmi Note 4X or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on performance (99/100 vs 14/100).
Should you choose the Redmi Note 4X over the Vivo iQOO 15 Ultra?
The Redmi Note 4X 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, budget-conscious buyers.