Redmi Note 4X vs Vivo iQOO 15
The Redmi Note 4X (2017) runs on the Qualcomm Snapdragon 625, while the Vivo iQOO 15 (2025) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $160 and $599. By overall MobileRank rating, the Vivo iQOO 15 leads — 86/100 vs 22/100 (a 64-point difference). Key differences: the Vivo iQOO 15 has the bigger battery (7000 mAh vs 4100); the main camera is 13 MP vs 50 MP; the Vivo iQOO 15 is faster in AnTuTu (3,740,528 vs 218,879); the Vivo iQOO 15 has NFC for contactless payments, the Redmi Note 4X doesn't; the Redmi Note 4X is noticeably lighter (165g vs 215g).
Redmi Note 4X
Vivo iQOO 15
- Lighter: 165g vs 215g
- Cheaper at launch: $160 vs $599
- Better portability (74/100 vs 48/100)
- Higher AnTuTu: 3740528 vs 218879
- Better Geekbench Single: 3041 vs 189
- Better Geekbench Multi: 9494 vs 862
- Bigger battery: 7000 vs 4100 mAh
- Better main camera: 50MP vs 13MP
- Higher refresh rate: 144Hz vs 60Hz
- Higher performance (94/100 vs 14/100)
- Better camera (78/100 vs 10/100)
- Longer battery life (85/100 vs 35/100)
- Better display (99/100 vs 32/100)
Comparing the Redmi Note 4X vs the Vivo iQOO 15, the Vivo iQOO 15 scores 64 points higher (86/100 vs 22/100). In the "performance" category, the Vivo iQOO 15 leads (94/100 vs 14/100). In the "camera" category, the Vivo iQOO 15 leads (78/100 vs 10/100). In the "battery" category, the Vivo iQOO 15 leads (85/100 vs 35/100). Value score: Redmi Note 4X — 16/100, Vivo iQOO 15 — 84/100; 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 significantly outperforms the Redmi Note 4X (94/100 vs 14/100). In the "display" category, the Vivo iQOO 15 significantly outperforms the Redmi Note 4X (99/100 vs 32/100). In the "camera" category, the Vivo iQOO 15 significantly outperforms the Redmi Note 4X (78/100 vs 10/100). In the "battery" category, the Vivo iQOO 15 significantly outperforms the Redmi Note 4X (85/100 vs 35/100). In the "portability" category, the Redmi Note 4X notably outperforms the Vivo iQOO 15 (74/100 vs 48/100).
| Specification | Redmi Note 4X | Vivo iQOO 15 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 625 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 218879 | 3740528 | |
| Geekbench Single | 189 | 3041 | |
| Geekbench Multi | 862 | 9494 | |
| Display | 5.5" IPS LCD | 6.8" LTPO AMOLED | |
| Resolution | — | 1440x3168 | |
| Refresh rate | 60 Hz | 144 Hz | |
| Battery | 4100 mAh | 7000 mAh | |
| Charging | — | 100W | |
| Wireless charging | — | 40W | |
| 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 | |
| Storage | 32GB / 64GB | 256GB / 512GB / 1TB | |
| OS | — | Android 16 | |
| Brightness (peak) | — | 6000 nits | |
| NFC | no | yes | |
| Protection | — | IP68 | |
| Dimensions | 151.0×76.0×8.5 mm | 163.7×76.8×8.1 mm | |
| Weight | 165 g | 215 g | |
| Launch price | $160 | $599 |
Redmi Note 4X
- Main: 13MP
- Front: 5MP
Vivo iQOO 15
- 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
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Redmi Note 4X
- 4100 mAh
- Wireless charging: no data
Vivo iQOO 15
- 7000 mAh
- NanoReview test: web browsing 18:52 hrs, total 39:26 hrs
- Wired: 100W
- Wireless: 40W
We compared Redmi Note 4X and Vivo iQOO 15, covering their specs and all relevant benchmarks.
Vivo iQOO 15 leads Redmi Note 4X by 94.1% in our overall performance rating.
Launch price difference: $439. Redmi Note 4X was $439 cheaper at launch.
performance
In the "performance" category, the Vivo iQOO 15 significantly outperforms the Redmi Note 4X (94/100 vs 14/100).
display
In the "display" category, the Vivo iQOO 15 significantly outperforms the Redmi Note 4X (99/100 vs 32/100).
camera
In the "camera" category, the Vivo iQOO 15 significantly outperforms the Redmi Note 4X (78/100 vs 10/100).
battery
In the "battery" category, the Vivo iQOO 15 significantly outperforms the Redmi Note 4X (85/100 vs 35/100).
portability
In the "portability" category, the Redmi Note 4X notably outperforms the Vivo iQOO 15 (74/100 vs 48/100).
Which is better: the Redmi Note 4X or the Vivo iQOO 15?
The Vivo iQOO 15 significantly outperforms the Redmi Note 4X by 64 points (86/100 vs 22/100).
What is the rating of the Redmi Note 4X and the Vivo iQOO 15?
The Redmi Note 4X has a MobileRank rating of 22/100, the Vivo iQOO 15 — 86/100.
Which has the better camera: the Redmi Note 4X or the Vivo iQOO 15?
The Vivo iQOO 15 leads on camera score (78/100 vs 10/100).
Which is more powerful: the Redmi Note 4X or the Vivo iQOO 15?
The Vivo iQOO 15 leads on performance (94/100 vs 14/100).
Should you choose the Redmi Note 4X over the Vivo iQOO 15?
The Redmi Note 4X is a better fit for everyday use. The Vivo iQOO 15 is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.