Redmi K40S vs Vivo iQOO 15 Ultra
The Redmi K40S (2022) runs on the Qualcomm Snapdragon 870 5G, 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 54/100 (a 35-point difference). Key differences: the Vivo iQOO 15 Ultra has the bigger battery (7400 mAh vs 4500); the main camera is 48 MP vs 50 MP; the Vivo iQOO 15 Ultra is faster in AnTuTu (4,602,290 vs 1,010,069); the Redmi K40S is noticeably lighter (195g vs 227g).
Profile comparison
Category scores
Redmi K40S
Vivo iQOO 15 Ultra
What makes Redmi K40S better?
- Lighter: 195g vs 227g
- Better portability (65/100 vs 35/100)
What makes Vivo iQOO 15 Ultra better?
- Higher AnTuTu: 4602290 vs 1010069
- Better Geekbench Single: 3639 vs 1298
- Better Geekbench Multi: 11047 vs 3520
- Bigger battery: 7400 vs 4500 mAh
- Faster charging: 120W vs 67W
- Better main camera: 50MP vs 48MP
- Higher refresh rate: 144Hz vs 120Hz
- Higher performance (99/100 vs 61/100)
- Better camera (78/100 vs 36/100)
- Longer battery life (92/100 vs 42/100)
- Better display (99/100 vs 79/100)
Comparison verdict
Comparing the Redmi K40S vs the Vivo iQOO 15 Ultra, the Vivo iQOO 15 Ultra scores 35 points higher (89/100 vs 54/100). In the "performance" category, the Vivo iQOO 15 Ultra leads (99/100 vs 61/100). In the "camera" category, the Vivo iQOO 15 Ultra leads (78/100 vs 36/100). In the "battery" category, the Vivo iQOO 15 Ultra leads (92/100 vs 42/100). In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi K40S (99/100 vs 61/100). In the "display" category, the Vivo iQOO 15 Ultra notably outperforms the Redmi K40S (99/100 vs 79/100). In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi K40S (78/100 vs 36/100). In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi K40S (92/100 vs 42/100). In the "portability" category, the Redmi K40S significantly outperforms the Vivo iQOO 15 Ultra (65/100 vs 35/100).
Specs comparison
| Specification | Redmi K40S | Vivo iQOO 15 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 870 5G | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 1010069 | 4602290 | |
| Geekbench Single | 1298 | 3639 | |
| Geekbench Multi | 3520 | 11047 | |
| Display | 6.7" AMOLED | 6.8" LTPO AMOLED | |
| Resolution | 1080x2400 | 1440x3168 | |
| Refresh rate | 120 Hz | 144 Hz | |
| Battery | 4500 mAh | 7400 mAh | |
| Charging | 67W | 120W | |
| Wireless charging | 0W | 50W | |
| Main camera | 48 MP | 50 MP | |
| Ultrawide | 8 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 20 MP | 32 MP | |
| RAM | 6GB / 8GB / 12GB | 12GB / 16GB / 24GB | |
| Storage | 128GB / 256GB | 256GB / 512GB / 1TB | |
| OS | Android 12, MIUI 13 | Android 16 | |
| Brightness (peak) | 1300 nits | 8000 nits | |
| NFC | yes | yes | |
| Protection | — | IP68 | |
| Dimensions | 163.2×76.0×7.7 mm | 163.7×76.8×8.7 mm | |
| Weight | 195 g | 227 g | |
| Launch price | — | $799 |
Camera comparison
Redmi K40S
- Main: 48MP f/1.8
- Ultrawide: 8MP
- Front: 20MP
Vivo iQOO 15 Ultra
- Main: 50MP f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Display comparison
Redmi K40S
- 6.7" AMOLED
- Resolution: 1080x2400
- Refresh rate: 120 Hz
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Battery and charging
Redmi K40S
- 4500 mAh
- Wired: 67W
- No wireless charging
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
Overall performance score
We compared Redmi K40S and Vivo iQOO 15 Ultra, covering their specs and all relevant benchmarks.
Vivo iQOO 15 Ultra leads Redmi K40S by 78.1% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Redmi K40S
Price unknownDetailed category analysis
performance
In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi K40S (99/100 vs 61/100).
display
In the "display" category, the Vivo iQOO 15 Ultra notably outperforms the Redmi K40S (99/100 vs 79/100).
camera
In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi K40S (78/100 vs 36/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi K40S (92/100 vs 42/100).
portability
In the "portability" category, the Redmi K40S significantly outperforms the Vivo iQOO 15 Ultra (65/100 vs 35/100).
Frequently asked questions
Which is better: the Redmi K40S or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra significantly outperforms the Redmi K40S by 35 points (89/100 vs 54/100).
What is the rating of the Redmi K40S and the Vivo iQOO 15 Ultra?
The Redmi K40S has a MobileRank rating of 54/100, the Vivo iQOO 15 Ultra — 89/100.
Which has the better camera: the Redmi K40S or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on camera score (78/100 vs 36/100).
Which is more powerful: the Redmi K40S or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on performance (99/100 vs 61/100).
Should you choose the Redmi K40S over the Vivo iQOO 15 Ultra?
The Redmi K40S is a better fit for active users. The Vivo iQOO 15 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.