Motorola Signature vs Redmi K90 Ultra
The Motorola Signature (2026) runs on the Qualcomm Snapdragon 8 Gen 5, while the Redmi K90 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $699 and $420. By overall MobileRank rating, the Motorola Signature leads — 86/100 vs 73/100 (a 13-point difference). Key differences: the Redmi K90 Ultra has the bigger battery (8550 mAh vs 5200); the Redmi K90 Ultra is faster in AnTuTu (3,233,695 vs 3,057,215); the Motorola Signature is noticeably lighter (186g vs 227g).
Profile comparison
Category scores
Motorola Signature
Redmi K90 Ultra
What makes Motorola Signature better?
- Lighter: 186g vs 227g
- Better camera (91/100 vs 37/100)
- Better portability (78/100 vs 40/100)
What makes Redmi K90 Ultra better?
- Higher AnTuTu: 3233695 vs 3057215
- Better Geekbench Single: 3013 vs 2833
- Better Geekbench Multi: 9287 vs 9119
- Bigger battery: 8550 vs 5200 mAh
- Faster charging: 100W vs 90W
- Higher refresh rate: 165Hz vs 120Hz
- Cheaper at launch: $420 vs $699
- Higher performance (92/100 vs 90/100)
- Longer battery life (78/100 vs 77/100)
- Better display (94/100 vs 84/100)
Comparison verdict
Comparing the Motorola Signature vs the Redmi K90 Ultra, the Motorola Signature scores 13 points higher (86/100 vs 73/100). In the "camera" category, the Motorola Signature leads (91/100 vs 37/100). Value score: Motorola Signature — 86/100, Redmi K90 Ultra — 72/100; 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 Redmi K90 Ultra and the Motorola Signature are nearly equal (92/100 vs 90/100). In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 84/100). In the "camera" category, the Motorola Signature significantly outperforms the Redmi K90 Ultra (91/100 vs 37/100). In the "battery" category, the Redmi K90 Ultra and the Motorola Signature are nearly equal (78/100 vs 77/100). In the "portability" category, the Motorola Signature significantly outperforms the Redmi K90 Ultra (78/100 vs 40/100).
Specs comparison
| Specification | Motorola Signature | Redmi K90 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Gen 5 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 3057215 | 3233695 | |
| Geekbench Single | 2833 | 3013 | |
| Geekbench Multi | 9119 | 9287 | |
| Display | 6.8" AMOLED | 6.8" AMOLED | |
| Resolution | 1264x2780 | 1280x2772 | |
| Refresh rate | 120 Hz | 165 Hz | |
| Battery | 5200 mAh | 8550 mAh | |
| Charging | 90W | 100W | |
| Wireless charging | 50W | 0W | |
| DXOMark (camera) | 164 | — | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 13 MP | 8 MP | |
| Telephoto | 50 MP | 0 MP | |
| Front camera | 32 MP | 20 MP | |
| RAM | 12GB / 16GB | 12GB / 16GB | |
| Storage | 256GB / 512GB / 1TB | 256GB / 512GB | |
| OS | Android 16 | Android 16 | |
| Brightness (peak) | 6200 nits | 3500 nits | |
| NFC | yes | yes | |
| Protection | IP68 | IP68/IP69 | |
| Dimensions | 162.1×76.4×7.0 mm | 162.9×77.9×8.2 mm | |
| Weight | 186 g | 227 g | |
| Launch price | $699 | $420 |
Camera comparison
Motorola Signature
- Main: 50MP f/1.8
- Ultrawide: 13MP
- Telephoto: 50MP
- Front: 32MP
Redmi K90 Ultra
- Main: 50MP f/1.7
- Ultrawide: 8MP
- Front: 20MP
Display comparison
Motorola Signature
- 6.8" AMOLED
- Resolution: 1264x2780
- Refresh rate: 120 Hz
Redmi K90 Ultra
- 6.8" AMOLED
- Resolution: 1280x2772
- Refresh rate: 165 Hz
Battery and charging
Motorola Signature
- 5200 mAh
- Wired: 90W
- Wireless: 50W
Redmi K90 Ultra
- 8550 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Motorola Signature and Redmi K90 Ultra, covering their specs and all relevant benchmarks.
Redmi K90 Ultra leads Motorola Signature by 5.5% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $279. Redmi K90 Ultra was $279 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K90 Ultra and the Motorola Signature are nearly equal (92/100 vs 90/100).
display
In the "display" category, the Redmi K90 Ultra is a bit better (94/100 vs 84/100).
camera
In the "camera" category, the Motorola Signature significantly outperforms the Redmi K90 Ultra (91/100 vs 37/100).
battery
In the "battery" category, the Redmi K90 Ultra and the Motorola Signature are nearly equal (78/100 vs 77/100).
portability
In the "portability" category, the Motorola Signature significantly outperforms the Redmi K90 Ultra (78/100 vs 40/100).
Frequently asked questions
Which is better: the Motorola Signature or the Redmi K90 Ultra?
The Motorola Signature is noticeably better than the Redmi K90 Ultra — the overall rating gap is 13 points.
What is the rating of the Motorola Signature and the Redmi K90 Ultra?
The Motorola Signature has a MobileRank rating of 86/100, the Redmi K90 Ultra — 73/100.
Which has the better camera: the Motorola Signature or the Redmi K90 Ultra?
The Motorola Signature leads on camera score (91/100 vs 37/100).
Should you choose the Motorola Signature over the Redmi K90 Ultra?
The Motorola Signature is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life, budget-conscious buyers. The Redmi K90 Ultra is a better fit for gamers and power users, those who care about battery life.