Redmi K90 Ultra vs ZTE S30
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the ZTE S30 (2021) runs on the Qualcomm Snapdragon 720G. By overall MobileRank rating, the Redmi K90 Ultra leads — 73/100 vs 42/100 (a 31-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 4000); the main camera is 50 MP vs 64 MP; the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 517,460); the Redmi K90 Ultra has NFC for contactless payments, the ZTE S30 doesn't; the ZTE S30 is noticeably lighter (184g vs 227g).
Profile comparison
Category scores
Redmi K90 Ultra
ZTE S30
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 517460
- Better Geekbench Single: 3013 vs 746
- Better Geekbench Multi: 9287 vs 1762
- Bigger battery: 8550 vs 4000 mAh
- Faster charging: 100W vs 30W
- Higher refresh rate: 165Hz vs 90Hz
- Higher performance (92/100 vs 41/100)
- Longer battery life (78/100 vs 24/100)
- Better display (94/100 vs 54/100)
What makes ZTE S30 better?
- Better main camera: 64MP vs 50MP
- Lighter: 184g vs 227g
- Better camera (43/100 vs 37/100)
- Better portability (70/100 vs 40/100)
Comparison verdict
Comparing the Redmi K90 Ultra vs the ZTE S30, the Redmi K90 Ultra scores 31 points higher (73/100 vs 42/100). In the "performance" category, the Redmi K90 Ultra leads (92/100 vs 41/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 24/100). In the "performance" category, the Redmi K90 Ultra significantly outperforms the ZTE S30 (92/100 vs 41/100). In the "display" category, the Redmi K90 Ultra significantly outperforms the ZTE S30 (94/100 vs 54/100). In the "camera" category, the ZTE S30 is a bit better (43/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra significantly outperforms the ZTE S30 (78/100 vs 24/100). In the "portability" category, the ZTE S30 significantly outperforms the Redmi K90 Ultra (70/100 vs 40/100).
Specs comparison
| Specification | Redmi K90 Ultra | ZTE S30 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Qualcomm Snapdragon 720G | |
| AnTuTu | 3233695 | 517460 | |
| Geekbench Single | 3013 | 746 | |
| Geekbench Multi | 9287 | 1762 | |
| Display | 6.8" AMOLED | 6.7" IPS LCD | |
| Resolution | 1280x2772 | 1080x2400 | |
| Refresh rate | 165 Hz | 90 Hz | |
| Battery | 8550 mAh | 4000 mAh | |
| Charging | 100W | 30W | |
| Main camera | 50 MP | 64 MP | |
| Ultrawide | 8 MP | 8 MP | |
| Front camera | 20 MP | 16 MP | |
| RAM | 12GB / 16GB | 8GB | |
| Storage | 256GB / 512GB | 128GB / 256GB | |
| OS | Android 16 | Android 11, MyOS 11 | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | no | |
| Protection | IP68/IP69 | — | |
| Dimensions | 162.9×77.9×8.2 mm | 164.8×76.4×7.9 mm | |
| Weight | 227 g | 184 g | |
| Launch price | $420 | — |
Camera comparison
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
ZTE S30
- Main: 64MP f/1.8
- Ultrawide: 8MP
- Front: 16MP
Display comparison
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
ZTE S30
- 6.7" IPS LCD
- Resolution: 1080x2400
- Refresh rate: 90 Hz
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
ZTE S30
- 4000 mAh
- Wired: 30W
- No wireless charging
Overall performance score
We compared Redmi K90 Ultra and ZTE S30, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads ZTE S30 by 524.9% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
ZTE S30
Price unknownDetailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra significantly outperforms the ZTE S30 (92/100 vs 41/100).
display
In the "display" category, the Redmi K90 Ultra significantly outperforms the ZTE S30 (94/100 vs 54/100).
camera
In the "camera" category, the ZTE S30 is a bit better (43/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra significantly outperforms the ZTE S30 (78/100 vs 24/100).
portability
In the "portability" category, the ZTE S30 significantly outperforms the Redmi K90 Ultra (70/100 vs 40/100).
Frequently asked questions
Which is better: the Redmi K90 Ultra or the ZTE S30?
The Redmi K90 Ultra significantly outperforms the ZTE S30 by 31 points (73/100 vs 42/100).
What is the rating of the Redmi K90 Ultra and the ZTE S30?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the ZTE S30 — 42/100.
Which has the better camera: the Redmi K90 Ultra or the ZTE S30?
The ZTE S30 leads on camera score (43/100 vs 37/100).
Which is more powerful: the Redmi K90 Ultra or the ZTE S30?
The Redmi K90 Ultra leads on performance (92/100 vs 41/100).
Should you choose the Redmi K90 Ultra over the ZTE S30?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.