Redmi K90 Ultra vs Vivo X Fold6
The Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite, while the Vivo X Fold6 (2026) runs on the MediaTek Dimensity 9500; launch prices were $420 and $1900. By overall MobileRank rating, the Vivo X Fold6 leads — 88/100 vs 73/100 (a 15-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 6900); the main camera is 50 MP vs 200 MP; the Vivo X Fold6 is faster in AnTuTu (3,455,738 vs 3,233,695); the Vivo X Fold6 is thinner (4.3mm vs 8.2mm).
Profile comparison
Category scores
Redmi K90 Ultra
Vivo X Fold6
What makes Redmi K90 Ultra better?
- Bigger battery: 8550 vs 6900 mAh
- Faster charging: 100W vs 80W
- Higher refresh rate: 165Hz vs 120Hz
- Cheaper at launch: $420 vs $1900
- Better display (94/100 vs 81/100)
What makes Vivo X Fold6 better?
- Higher AnTuTu: 3455738 vs 3233695
- Better Geekbench Single: 3293 vs 3013
- Better Geekbench Multi: 10243 vs 9287
- Better main camera: 200MP vs 50MP
- Higher performance (95/100 vs 92/100)
- Better camera (87/100 vs 37/100)
- Longer battery life (82/100 vs 78/100)
- Better portability (100/100 vs 40/100)
Comparison verdict
Comparing the Redmi K90 Ultra vs the Vivo X Fold6, the Vivo X Fold6 scores 15 points higher (88/100 vs 73/100). In the "camera" category, the Vivo X Fold6 leads (87/100 vs 37/100). Value score: Redmi K90 Ultra — 72/100, Vivo X Fold6 — 84/100; 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 Vivo X Fold6 and the Redmi K90 Ultra are nearly equal (95/100 vs 92/100). In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 81/100). In the "camera" category, the Vivo X Fold6 significantly outperforms the Redmi K90 Ultra (87/100 vs 37/100). In the "battery" category, the Vivo X Fold6 and the Redmi K90 Ultra are nearly equal (82/100 vs 78/100). In the "portability" category, the Vivo X Fold6 significantly outperforms the Redmi K90 Ultra (100/100 vs 40/100).
Specs comparison
| Specification | Redmi K90 Ultra | Vivo X Fold6 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite | MediaTek Dimensity 9500 | |
| AnTuTu | 3233695 | 3455738 | |
| Geekbench Single | 3013 | 3293 | |
| Geekbench Multi | 9287 | 10243 | |
| Display | 6.8" AMOLED | 8.0" LTPO AMOLED | |
| Resolution | 1280x2772 | 2480x2200 | |
| Refresh rate | 165 Hz | 120 Hz | |
| Battery | 8550 mAh | 6900 mAh | |
| Charging | 100W | 80W | |
| Wireless charging | 0W | 50W | |
| Main camera | 50 MP | 200 MP | |
| Ultrawide | 8 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 20 MP | 20 MP | |
| RAM | 12GB / 16GB | 16GB | |
| Storage | 256GB / 512GB | 512GB | |
| OS | Android 16 | Android 15 | |
| Brightness (peak) | 3500 nits | 5500 nits | |
| NFC | yes | yes | |
| Protection | IP68/IP69 | IP68 | |
| Dimensions | 162.9×77.9×8.2 mm | 159.7×142.3×4.3 mm | |
| Weight | 227 g | — | |
| Launch price | $420 | $1900 |
Camera comparison
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Vivo X Fold6
- Main: 200MP f/1.75
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 20MP
Display comparison
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Vivo X Fold6
- 8.0" LTPO AMOLED
- Resolution: 2480x2200
- Refresh rate: 120 Hz
Battery and charging
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Vivo X Fold6
- 6900 mAh
- Wired: 80W
- Wireless: 50W
Overall performance score
We compared Redmi K90 Ultra and Vivo X Fold6, covering their specs and all relevant benchmarks.
Vivo X Fold6 leads Redmi K90 Ultra by 6.4% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $1480. Redmi K90 Ultra was $1480 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Vivo X Fold6 and the Redmi K90 Ultra are nearly equal (95/100 vs 92/100).
display
In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 81/100).
camera
In the "camera" category, the Vivo X Fold6 significantly outperforms the Redmi K90 Ultra (87/100 vs 37/100).
battery
In the "battery" category, the Vivo X Fold6 and the Redmi K90 Ultra are nearly equal (82/100 vs 78/100).
portability
In the "portability" category, the Vivo X Fold6 significantly outperforms the Redmi K90 Ultra (100/100 vs 40/100).
Frequently asked questions
Which is better: the Redmi K90 Ultra or the Vivo X Fold6?
The Vivo X Fold6 is noticeably better than the Redmi K90 Ultra — the overall rating gap is 15 points.
What is the rating of the Redmi K90 Ultra and the Vivo X Fold6?
The Redmi K90 Ultra has a MobileRank rating of 73/100, the Vivo X Fold6 — 88/100.
Which has the better camera: the Redmi K90 Ultra or the Vivo X Fold6?
The Vivo X Fold6 leads on camera score (87/100 vs 37/100).
Should you choose the Redmi K90 Ultra over the Vivo X Fold6?
The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life. The Vivo X Fold6 is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life, budget-conscious buyers.