Redmi K90 Ultra vs Vivo iQOO Z6 (China)
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Vivo iQOO Z6 (China) (2022) runs on the Qualcomm Snapdragon 778G+ 5G. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 50/100 (a 23-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 4500); the main camera is 50 MP vs 64 MP; the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 820,210); the Vivo iQOO Z6 (China) is noticeably lighter (194g vs 227g).
Profile comparison
Category scores
Redmi K90 Ultra
Vivo iQOO Z6 (China)
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 820210
- Better Geekbench Single: 3013 vs 1059
- Better Geekbench Multi: 9287 vs 3012
- Bigger battery: 8550 vs 4500 mAh
- Faster charging: 100W vs 80W
- Higher refresh rate: 165Hz vs 120Hz
- Higher performance (92/100 vs 55/100)
- Longer battery life (78/100 vs 45/100)
- Better display (94/100 vs 66/100)
What makes Vivo iQOO Z6 (China) better?
- Better main camera: 64MP vs 50MP
- Lighter: 194g vs 227g
- Better portability (56/100 vs 40/100)
Comparison verdict
Comparing the Redmi K90 Ultra vs the Vivo iQOO Z6 (China), the Redmi K90 Ultra scores 23 points higher (73/100 vs 50/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 55/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 45/100). In the "performance" category, the Redmi K90 Ultra significantly outperforms the Vivo iQOO Z6 (China) (92/100 vs 55/100). In the "display" category, the Redmi K90 Ultra notably outperforms the Vivo iQOO Z6 (China) (94/100 vs 66/100). In the "camera" category, both devices are on the same level — 37/100. In the "battery" category, the Redmi K90 Ultra significantly outperforms the Vivo iQOO Z6 (China) (78/100 vs 45/100). In the "portability" category, the Vivo iQOO Z6 (China) notably outperforms the Redmi K90 Ultra (56/100 vs 40/100).
Specs comparison
| Specification | Redmi K90 Ultra | Vivo iQOO Z6 (China) | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 778G+ 5G | |
| AnTuTu | 3233695 | 820210 | |
| Geekbench Single | 3013 | 1059 | |
| Geekbench Multi | 9287 | 3012 | |
| Display | 6.8" AMOLED | 6.6" IPS LCD | |
| Resolution | 1280x2772 | 1080x2388 | |
| Refresh rate | 165 Hz | 120 Hz | |
| Battery | 8550 mAh | 4500 mAh | |
| Charging | 100W | 80W | |
| Main camera | 50 MP | 64 MP | |
| Ultrawide | 8 MP | 0 MP | |
| Front camera | 20 MP | 8 MP | |
| RAM | 12GB / 16GB | 8GB / 12GB | |
| Storage | 256GB / 512GB | 128GB / 256GB | |
| OS | Android 16 | Android 12, Origin OS Ocean | |
| Brightness (peak) | 3500 nits | 650 nits | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | — | |
| Dimensions | 162.9×77.9×8.2 mm | 164.0×75.8×8.6 mm | |
| Weight | 227 g | 194 g | |
| Launch price | $420 | — |
Camera comparison
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Vivo iQOO Z6 (China)
- Main: 64MP f/1.8
- Front: 8MP
Display comparison
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Vivo iQOO Z6 (China)
- 6.6" IPS LCD
- Resolution: 1080x2388
- Refresh rate: 120 Hz
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Vivo iQOO Z6 (China)
- 4500 mAh
- Wired: 80W
- No wireless charging
Overall performance score
We compared Redmi K90 Ultra and Vivo iQOO Z6 (China), covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Vivo iQOO Z6 (China) by 294.3% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Vivo iQOO Z6 (China)
Price unknownDetailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the Vivo iQOO Z6 (China) (92/100 vs 55/100).
display
In the "display" category, the Redmi K90 Ultra notably outperforms the Vivo iQOO Z6 (China) (94/100 vs 66/100).
camera
In the "camera" category, both devices are on the same level — 37/100.
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the Vivo iQOO Z6 (China) (78/100 vs 45/100).
portability
In the "portability" category, the Vivo iQOO Z6 (China) notably outperforms the Redmi K90 Ultra (56/100 vs 40/100).
Frequently asked questions
Which is better: the Redmi K90 Ultra or the Vivo iQOO Z6 (China)?
The Redmi K90 Ultra significantly outperforms the Vivo iQOO Z6 (China) by 23 points (73/100 vs 50/100).
What is the rating of the Redmi K90 Ultra and the Vivo iQOO Z6 (China)?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Vivo iQOO Z6 (China) — 50/100.
Which is more powerful: the Redmi K90 Ultra or the Vivo iQOO Z6 (China)?
The Redmi K90 Ultra leads on performance (92/100 vs 55/100).
Should you choose the Redmi K90 Ultra over the Vivo iQOO Z6 (China)?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.