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; estimated prices are $401 and $2199. By overall MobileRank rating, the Samsung Galaxy Z Fold8 Ultra leads — 71/100 vs 68/100 (a 3-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 (3,942,923 vs 3,088,357); the Samsung Galaxy Z Fold8 Ultra is thinner (4.1mm vs 8.0mm).
Redmi K90
Samsung Galaxy Z Fold8 Ultra
- Bigger battery: 7100 vs 5000 mAh
- Faster charging: 100W vs 60W
- Lighter: 206g vs 215g
- Cheaper: $401 vs $2199
- Longer battery life (71/100 vs 51/100)
- Better design/ergonomics (42/100 vs 31/100)
- Better value for money (82/100 vs 0/100)
- Higher AnTuTu: 3942923 vs 3088357
- Better Geekbench Single: 3640 vs 3050
- Better Geekbench Multi: 11033 vs 9300
- Better main camera: 200MP vs 50MP
- Higher performance (92/100 vs 69/100)
- Better camera (64/100 vs 53/100)
Comparing the Redmi K90 vs the Samsung Galaxy Z Fold8 Ultra, the Samsung Galaxy Z Fold8 Ultra scores 3 points higher (71/100 vs 68/100). In the "performance" category, the Samsung Galaxy Z Fold8 Ultra leads (92/100 vs 69/100). In the "camera" category, the Samsung Galaxy Z Fold8 Ultra leads (64/100 vs 53/100). In the "battery" category, the Redmi K90 leads (71/100 vs 51/100). In the "value for money" category, the Redmi K90 leads (82/100 vs 0/100). In the "performance" category, the Samsung Galaxy Z Fold8 Ultra notably outperforms the Redmi K90 (92/100 vs 69/100). In the "display" category, both devices are on the same level — 100/100. In the "camera" category, the Samsung Galaxy Z Fold8 Ultra is a bit better (64/100 vs 53/100). In the "battery" category, the Redmi K90 notably outperforms the Samsung Galaxy Z Fold8 Ultra (71/100 vs 51/100). In the "design" category, the Redmi K90 is a bit better (42/100 vs 31/100). In the "value for money" category, the Redmi K90 significantly outperforms the Samsung Galaxy Z Fold8 Ultra (82/100 vs 0/100).
| Specification | Redmi K90 | Samsung Galaxy Z Fold8 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 3088357 | 3942923 | |
| Geekbench Single | 3050 | 3640 | |
| Geekbench Multi | 9300 | 11033 | |
| 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 | |
| Price | $401 | $2199 |
Redmi K90
- Main: 50MP f/f/1.9
- Ultrawide: 8MP
- Telephoto: 50MP
- Front: 20MP
Samsung Galaxy Z Fold8 Ultra
- Main: 200MP f/f/1.7
- Ultrawide: 50MP
- Telephoto: 10MP
- Front: 10MP
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
Redmi K90
- 7100 mAh
- Wired: 100W
- No wireless charging
Samsung Galaxy Z Fold8 Ultra
- 5000 mAh
- Wired: 60W
- Wireless: 25W
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 21.7% in our overall performance rating.
Price difference: $1798. Redmi K90 is cheaper by $1798.
performance
In the "performance" category, the Samsung Galaxy Z Fold8 Ultra notably outperforms the Redmi K90 (92/100 vs 69/100).
display
In the "display" category, both devices are on the same level — 100/100.
camera
In the "camera" category, the Samsung Galaxy Z Fold8 Ultra is a bit better (64/100 vs 53/100).
battery
In the "battery" category, the Redmi K90 notably outperforms the Samsung Galaxy Z Fold8 Ultra (71/100 vs 51/100).
design
In the "design" category, the Redmi K90 is a bit better (42/100 vs 31/100).
value for money
In the "value for money" category, the Redmi K90 significantly outperforms the Samsung Galaxy Z Fold8 Ultra (82/100 vs 0/100).
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 3 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 68/100, the Samsung Galaxy Z Fold8 Ultra — 71/100.
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 (64/100 vs 53/100).
Which is more powerful: the Redmi K90 or the Samsung Galaxy Z Fold8 Ultra?
The Samsung Galaxy Z Fold8 Ultra leads on performance (92/100 vs 69/100).
Should you choose the Redmi K90 over the Samsung Galaxy Z Fold8 Ultra?
The Redmi K90 is a better fit for active users, budget-conscious buyers. The Samsung Galaxy Z Fold8 Ultra is a better fit for gamers and power users.