Redmi K100 vs Vivo iQOO 15 Ultra
The Redmi K100 (2026) runs on the Qualcomm Snapdragon 8 Elite, 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 74/100 (a 15-point difference). Key differences: the Redmi K100 has the bigger battery (10000 mAh vs 7400); the Vivo iQOO 15 Ultra is faster in AnTuTu (4,602,290 vs 3,126,402).
Profile comparison
Category scores
Redmi K100
Vivo iQOO 15 Ultra
What makes Redmi K100 better?
- Bigger battery: 10000 vs 7400 mAh
- Higher refresh rate: 165Hz vs 144Hz
- Overall rating 74/100
What makes Vivo iQOO 15 Ultra better?
- Higher AnTuTu: 4602290 vs 3126402
- Better Geekbench Single: 3639 vs 3013
- Better Geekbench Multi: 11047 vs 9287
- Faster charging: 120W vs 100W
- Higher performance (99/100 vs 91/100)
- Better camera (78/100 vs 37/100)
- Longer battery life (92/100 vs 80/100)
- Better display (99/100 vs 90/100)
Comparison verdict
Comparing the Redmi K100 vs the Vivo iQOO 15 Ultra, the Vivo iQOO 15 Ultra scores 15 points higher (89/100 vs 74/100). In the "camera" category, the Vivo iQOO 15 Ultra leads (78/100 vs 37/100). In the "battery" category, the Vivo iQOO 15 Ultra leads (92/100 vs 80/100). In the "performance" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 91/100). In the "display" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 90/100). In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi K100 (78/100 vs 37/100). In the "battery" category, the Vivo iQOO 15 Ultra is a bit better (92/100 vs 80/100).
Specs comparison
| Specification | Redmi K100 | Vivo iQOO 15 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 3126402 | 4602290 | |
| Geekbench Single | 3013 | 3639 | |
| Geekbench Multi | 9287 | 11047 | |
| Display | 6.8" AMOLED | 6.8" LTPO AMOLED | |
| Resolution | 1156x2510 | 1440x3168 | |
| Refresh rate | 165 Hz | 144 Hz | |
| Battery | 10000 mAh | 7400 mAh | |
| Charging | 100W | 120W | |
| Wireless charging | 0W | 50W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 8 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 20 MP | 32 MP | |
| RAM | 12GB / 16GB | 12GB / 16GB / 24GB | |
| Storage | 256GB / 512GB | 256GB / 512GB / 1TB | |
| OS | Android 17 | Android 16 | |
| Brightness (peak) | 3500 nits | 8000 nits | |
| NFC | yes | yes | |
| Protection | IP68 | IP68 | |
| Dimensions | — | 163.7×76.8×8.7 mm | |
| Weight | — | 227 g | |
| Launch price | — | $799 |
Camera comparison
Redmi K100
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Vivo iQOO 15 Ultra
- Main: 50MP f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Display comparison
Redmi K100
- 6.8" AMOLED
- Resolution: 1156x2510
- Refresh rate: 165 Hz
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Battery and charging
Redmi K100
- 10000 mAh
- Wired: 100W
- No wireless charging
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
Overall performance score
We compared Redmi K100 and Vivo iQOO 15 Ultra, covering their specs and all relevant benchmarks.
Vivo iQOO 15 Ultra leads Redmi K100 by 32.1% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Redmi K100
Price unknownDetailed category analysis
performance
In the "performance" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 91/100).
display
In the "display" category, the Vivo iQOO 15 Ultra is a bit better (99/100 vs 90/100).
camera
In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Redmi K100 (78/100 vs 37/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra is a bit better (92/100 vs 80/100).
Frequently asked questions
Which is better: the Redmi K100 or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra is noticeably better than the Redmi K100 — the overall rating gap is 15 points.
What is the rating of the Redmi K100 and the Vivo iQOO 15 Ultra?
The Redmi K100 has a MobileRank rating of 74/100, the Vivo iQOO 15 Ultra — 89/100.
Which has the better camera: the Redmi K100 or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on camera score (78/100 vs 37/100).
Which is more powerful: the Redmi K100 or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on performance (99/100 vs 91/100).
Should you choose the Redmi K100 over the Vivo iQOO 15 Ultra?
The Redmi K100 is a better fit for gamers and power users, those who care about battery life. The Vivo iQOO 15 Ultra is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers.