Redmi K90 Ultra vs Samsung Galaxy Z Fold8
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Samsung Galaxy Z Fold8 (2026) runs on the Snapdragon 8 Elite Gen 5; launch prices were $420 and $1999. Both devices score the same overall rating of 73/100. Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 4800); the Samsung Galaxy Z Fold8 is faster in AnTuTu (3,382,020 vs 3,233,695); the Samsung Galaxy Z Fold8 is noticeably lighter (201g vs 227g).
Profile comparison
Category scores
Redmi K90 Ultra
Samsung Galaxy Z Fold8
What makes Redmi K90 Ultra better?
- Bigger battery: 8550 vs 4800 mAh
- Faster charging: 100W vs 45W
- Higher refresh rate: 165Hz vs 120Hz
- Cheaper at launch: $420 vs $1999
- Longer battery life (78/100 vs 52/100)
- Better display (94/100 vs 80/100)
What makes Samsung Galaxy Z Fold8 better?
- Higher AnTuTu: 3382020 vs 3233695
- Better Geekbench Single: 3639 vs 3013
- Better Geekbench Multi: 11047 vs 9287
- Lighter: 201g vs 227g
- Higher performance (96/100 vs 92/100)
- Better camera (50/100 vs 37/100)
- Better portability (74/100 vs 40/100)
Comparison verdict
The Redmi K90 Ultra and the Samsung Galaxy Z Fold8 received the same MobileRank rating — 73/100. In the "camera" category, the Samsung Galaxy Z Fold8 leads (50/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 52/100). Value score: Redmi K90 Ultra — 72/100, Samsung Galaxy Z Fold8 — 54/100; it shows how far a model sits above or below the usual level for its price, and is not part of the overall rating. In the "performance" category, the Samsung Galaxy Z Fold8 and the Redmi K90 Ultra are nearly equal (96/100 vs 92/100). In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 80/100). In the "camera" category, the Samsung Galaxy Z Fold8 is a bit better (50/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra notably outperforms the Samsung Galaxy Z Fold8 (78/100 vs 52/100). In the "portability" category, the Samsung Galaxy Z Fold8 significantly outperforms the Redmi K90 Ultra (74/100 vs 40/100).
Specs comparison
| Specification | Redmi K90 Ultra | Samsung Galaxy Z Fold8 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 3233695 | 3382020 | |
| Geekbench Single | 3013 | 3639 | |
| Geekbench Multi | 9287 | 11047 | |
| Display | 6.8" AMOLED | 7.6" Foldable Dynamic LTPO AMOLED 2X | |
| Resolution | 1280x2772 | 1828x2448 | |
| Refresh rate | 165 Hz | 120 Hz | |
| Battery | 8550 mAh | 4800 mAh | |
| Charging | 100W | 45W | |
| Wireless charging | 0W | 15W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 8 MP | 50 MP | |
| Front camera | 20 MP | 10 MP | |
| RAM | 12GB / 16GB | 12GB / 16GB | |
| Storage | 256GB / 512GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 17 / One UI 9 | |
| Brightness (peak) | 3500 nits | 3000 nits | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | IP48 | |
| Dimensions | 162.9×77.9×8.2 mm | 123.9×161.4×4.5 mm | |
| Weight | 227 g | 201 g | |
| Launch price | $420 | $1999 |
Camera comparison
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Samsung Galaxy Z Fold8
- Main: 50MP f/1.8
- Ultrawide: 50MP
- Front: 10MP
Display comparison
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Samsung Galaxy Z Fold8
- 7.6" Foldable Dynamic LTPO AMOLED 2X
- Resolution: 1828x2448
- Refresh rate: 120 Hz
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Samsung Galaxy Z Fold8
- 4800 mAh
- Wired: 45W
- Wireless: 15W
Overall performance score
We compared Redmi K90 Ultra and Samsung Galaxy Z Fold8, covering their specs and all relevant benchmarks.
Samsung Galaxy Z Fold8 leads Redmi K90 Ultra by 4.4% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $1579. Redmi K90 Ultra was $1579 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Samsung Galaxy Z Fold8 and the Redmi K90 Ultra are nearly equal (96/100 vs 92/100).
display
In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 80/100).
camera
In the "camera" category, the Samsung Galaxy Z Fold8 is a bit better (50/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra notably outperforms the Samsung Galaxy Z Fold8 (78/100 vs 52/100).
portability
In the "portability" category, the Samsung Galaxy Z Fold8 significantly outperforms the Redmi K90 Ultra (74/100 vs 40/100).
Frequently asked questions
Which is better: the Redmi K90 Ultra or the Samsung Galaxy Z Fold8?
Both devices scored 73/100. The choice depends on your priorities: if performance matters more — go with the Samsung Galaxy Z Fold8 (96/100 vs 92/100).
What is the rating of the Redmi K90 Ultra and the Samsung Galaxy Z Fold8?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Samsung Galaxy Z Fold8 — 73/100.
Which has the better camera: the Redmi K90 Ultra or the Samsung Galaxy Z Fold8?
The Samsung Galaxy Z Fold8 leads on camera score (50/100 vs 37/100).
Should you choose the Redmi K90 Ultra over the Samsung Galaxy Z Fold8?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life. The Samsung Galaxy Z Fold8 is a better fit for gamers and power users.