Redmi K90 vs Samsung Galaxy Z Fold8 Ultra
The Redmi K90 (2025) 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 $401 and $2199. By overall MobileRank rating, the Samsung Galaxy Z Fold8 Ultra leads — 78/100 vs 76/100 (a 2-point difference). Key differences: the Redmi K90 has the bigger battery (7100 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 3,077,585); the Samsung Galaxy Z Fold8 Ultra is thinner (4.1mm vs 8.0mm).
Profile comparison
Category scores
Redmi K90
Samsung Galaxy Z Fold8 Ultra
What makes Redmi K90 better?
- Bigger battery: 7100 vs 5000 mAh
- Faster charging: 100W vs 60W
- Lighter: 206g vs 215g
- Cheaper at launch: $401 vs $2199
- Longer battery life (72/100 vs 61/100)
- Better display (82/100 vs 78/100)
What makes Samsung Galaxy Z Fold8 Ultra better?
- Higher AnTuTu: 3453998 vs 3077585
- Better Geekbench Single: 3639 vs 3013
- Better Geekbench Multi: 11047 vs 9287
- Better main camera: 200MP vs 50MP
- Higher performance (96/100 vs 91/100)
- Better camera (67/100 vs 58/100)
- Better portability (66/100 vs 55/100)
Comparison verdict
Comparing the Redmi K90 vs the Samsung Galaxy Z Fold8 Ultra, the Samsung Galaxy Z Fold8 Ultra scores 2 points higher (78/100 vs 76/100). In the "battery" category, the Redmi K90 leads (72/100 vs 61/100). Value score: Redmi K90 — 80/100, 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 is a bit better (96/100 vs 91/100). In the "display" category, the Redmi K90 and the Samsung Galaxy Z Fold8 Ultra are nearly equal (82/100 vs 78/100). In the "camera" category, the Samsung Galaxy Z Fold8 Ultra is a bit better (67/100 vs 58/100). In the "battery" category, the Redmi K90 is a bit better (72/100 vs 61/100). In the "portability" category, the Samsung Galaxy Z Fold8 Ultra is a bit better (66/100 vs 55/100).
Specs comparison
| Specification | Redmi K90 | Samsung Galaxy Z Fold8 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 3077585 | 3453998 | |
| Geekbench Single | 3013 | 3639 | |
| Geekbench Multi | 9287 | 11047 | |
| Display | 6.6" AMOLED | 8.0" Foldable Dynamic LTPO AMOLED 2X | |
| Resolution | 2510x1156 | 1968x2184 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 7100 mAh | 5000 mAh | |
| Charging | 100W | 60W | |
| Wireless charging | 0W | 25W | |
| Main camera | 50 MP | 200 MP | |
| Ultrawide | 8 MP | 50 MP | |
| Telephoto | 50 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 | IP48 | |
| Dimensions | 157.5×75.3×8.0 mm | — | |
| Weight | 206 g | 215 g | |
| Launch price | $401 | $2199 |
Camera comparison
Redmi K90
- Main: 50MP f/1.9
- Ultrawide: 8MP
- Telephoto: 50MP
- Front: 20MP
Samsung Galaxy Z Fold8 Ultra
- Main: 200MP f/1.7
- Ultrawide: 50MP
- Telephoto: 10MP
- Front: 10MP
Display comparison
Redmi K90
- 6.6" AMOLED
- Resolution: 2510x1156
- Refresh rate: 120 Hz
Samsung Galaxy Z Fold8 Ultra
- 8.0" Foldable Dynamic LTPO AMOLED 2X
- Resolution: 1968x2184
- Refresh rate: 120 Hz
Battery and charging
Redmi K90
- 7100 mAh
- Wired: 100W
- No wireless charging
Samsung Galaxy Z Fold8 Ultra
- 5000 mAh
- Wired: 60W
- Wireless: 25W
Overall performance score
We compared Redmi K90 and Samsung Galaxy Z Fold8 Ultra, covering their specs and all relevant benchmarks.
Samsung Galaxy Z Fold8 Ultra leads Redmi K90 by 10.9% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $1798. Redmi K90 was $1798 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Samsung Galaxy Z Fold8 Ultra is a bit better (96/100 vs 91/100).
display
In the "display" category, the Redmi K90 and the Samsung Galaxy Z Fold8 Ultra are nearly equal (82/100 vs 78/100).
camera
In the "camera" category, the Samsung Galaxy Z Fold8 Ultra is a bit better (67/100 vs 58/100).
battery
In the "battery" category, the Redmi K90 is a bit better (72/100 vs 61/100).
portability
In the "portability" category, the Samsung Galaxy Z Fold8 Ultra is a bit better (66/100 vs 55/100).
Frequently asked questions
Which is better: the Redmi K90 or the Samsung Galaxy Z Fold8 Ultra?
The Samsung Galaxy Z Fold8 Ultra edges out the Redmi K90 by just 2 points — the two devices are very close in overall level.
What is the rating of the Redmi K90 and the Samsung Galaxy Z Fold8 Ultra?
The Redmi K90 has a MobileRank rating of 76/100, the Samsung Galaxy Z Fold8 Ultra — 78/100.
Which has the better camera: the Redmi K90 or the Samsung Galaxy Z Fold8 Ultra?
The Samsung Galaxy Z Fold8 Ultra leads on camera score (67/100 vs 58/100).
Which is more powerful: the Redmi K90 or the Samsung Galaxy Z Fold8 Ultra?
The Samsung Galaxy Z Fold8 Ultra leads on performance (96/100 vs 91/100).
Should you choose the Redmi K90 over the Samsung Galaxy Z Fold8 Ultra?
The Redmi K90 is a better fit for gamers and power users, budget-conscious buyers. The Samsung Galaxy Z Fold8 Ultra is a better fit for gamers and power users.