Redmi K90 Ultra vs Samsung Galaxy Z Fold8 Ultra
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Samsung Galaxy Z Fold8 Ultra (2026) runs on the Snapdragon 8 Elite Gen 5; launch prices were $420 and $2199. By overall MobileRank rating, the Samsung Galaxy Z Fold8 Ultra leads — 78/100 vs 73/100 (a 5-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 5000); the main camera is 50 MP vs 200 MP; the Samsung Galaxy Z Fold8 Ultra is faster in AnTuTu (3,453,998 vs 3,233,695); the Samsung Galaxy Z Fold8 Ultra is thinner (4.1mm vs 8.2mm).
Profile comparison
Category scores
Redmi K90 Ultra
Samsung Galaxy Z Fold8 Ultra
What makes Redmi K90 Ultra better?
- Bigger battery: 8550 vs 5000 mAh
- Faster charging: 100W vs 60W
- Higher refresh rate: 165Hz vs 120Hz
- Cheaper at launch: $420 vs $2199
- Longer battery life (78/100 vs 61/100)
- Better display (94/100 vs 78/100)
What makes Samsung Galaxy Z Fold8 Ultra better?
- Higher AnTuTu: 3453998 vs 3233695
- Better Geekbench Single: 3639 vs 3013
- Better Geekbench Multi: 11047 vs 9287
- Better main camera: 200MP vs 50MP
- Lighter: 215g vs 227g
- Higher performance (96/100 vs 92/100)
- Better camera (67/100 vs 37/100)
- Better portability (66/100 vs 40/100)
Comparison verdict
Comparing the Redmi K90 Ultra vs the Samsung Galaxy Z Fold8 Ultra, the Samsung Galaxy Z Fold8 Ultra scores 5 points higher (78/100 vs 73/100). In the "camera" category, the Samsung Galaxy Z Fold8 Ultra leads (67/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra leads (78/100 vs 61/100). Value score: Redmi K90 Ultra — 72/100, Samsung Galaxy Z Fold8 Ultra — 64/100; 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 Ultra and the Redmi K90 Ultra are nearly equal (96/100 vs 92/100). In the "display" category, the Redmi K90 Ultra notably outperforms the Samsung Galaxy Z Fold8 Ultra (94/100 vs 78/100). In the "camera" category, the Samsung Galaxy Z Fold8 Ultra significantly outperforms the Redmi K90 Ultra (67/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra notably outperforms the Samsung Galaxy Z Fold8 Ultra (78/100 vs 61/100). In the "portability" category, the Samsung Galaxy Z Fold8 Ultra notably outperforms the Redmi K90 Ultra (66/100 vs 40/100).
Specs comparison
| Specification | Redmi K90 Ultra | Samsung Galaxy Z Fold8 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 3233695 | 3453998 | |
| Geekbench Single | 3013 | 3639 | |
| Geekbench Multi | 9287 | 11047 | |
| Display | 6.8" AMOLED | 8.0" Foldable Dynamic LTPO AMOLED 2X | |
| Resolution | 1280x2772 | 1968x2184 | |
| Refresh rate | 165 Hz | 120 Hz | |
| Battery | 8550 mAh | 5000 mAh | |
| Charging | 100W | 60W | |
| Wireless charging | 0W | 25W | |
| Main camera | 50 MP | 200 MP | |
| Ultrawide | 8 MP | 50 MP | |
| Telephoto | 0 MP | 10 MP | |
| Front camera | 20 MP | 10 MP | |
| RAM | 12GB / 16GB | 12GB / 16GB | |
| Storage | 256GB / 512GB | 256GB / 512GB / 1TB | |
| OS | Android 16 | Android 16 / One UI 8.5 | |
| Brightness (peak) | 3500 nits | — | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | IP48 | |
| Dimensions | 162.9×77.9×8.2 mm | — | |
| Weight | 227 g | 215 g | |
| Launch price | $420 | $2199 |
Camera comparison
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Samsung Galaxy Z Fold8 Ultra
- Main: 200MP f/1.7
- Ultrawide: 50MP
- Telephoto: 10MP
- Front: 10MP
Display comparison
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Samsung Galaxy Z Fold8 Ultra
- 8.0" Foldable Dynamic LTPO AMOLED 2X
- Resolution: 1968x2184
- Refresh rate: 120 Hz
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Samsung Galaxy Z Fold8 Ultra
- 5000 mAh
- Wired: 60W
- Wireless: 25W
Overall performance score
We compared Redmi K90 Ultra and Samsung Galaxy Z Fold8 Ultra, covering their specs and all relevant benchmarks.
Samsung Galaxy Z Fold8 Ultra leads Redmi K90 Ultra by 6.4% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $1779. Redmi K90 Ultra was $1779 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Samsung Galaxy Z Fold8 Ultra and the Redmi K90 Ultra are nearly equal (96/100 vs 92/100).
display
In the "display" category, the Redmi K90 Ultra notably outperforms the Samsung Galaxy Z Fold8 Ultra (94/100 vs 78/100).
camera
In the "camera" category, the Samsung Galaxy Z Fold8 Ultra significantly outperforms the Redmi K90 Ultra (67/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra notably outperforms the Samsung Galaxy Z Fold8 Ultra (78/100 vs 61/100).
portability
In the "portability" category, the Samsung Galaxy Z Fold8 Ultra notably outperforms the Redmi K90 Ultra (66/100 vs 40/100).
Frequently asked questions
Which is better: the Redmi K90 Ultra or the Samsung Galaxy Z Fold8 Ultra?
The Samsung Galaxy Z Fold8 Ultra edges out the Redmi K90 Ultra by just 5 points — the two devices are very close in overall level.
What is the rating of the Redmi K90 Ultra and the Samsung Galaxy Z Fold8 Ultra?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Samsung Galaxy Z Fold8 Ultra — 78/100.
Which has the better camera: the Redmi K90 Ultra or the Samsung Galaxy Z Fold8 Ultra?
The Samsung Galaxy Z Fold8 Ultra leads on camera score (67/100 vs 37/100).
Should you choose the Redmi K90 Ultra over the Samsung Galaxy Z Fold8 Ultra?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life. The Samsung Galaxy Z Fold8 Ultra is a better fit for gamers and power users.