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Signature 27 vs Redmi K90 Ultra

Motorola Signature 27 vs Xiaomi Redmi K90 Ultra

What Signature 27 does better (14) and where Redmi K90 Ultra wins (4) — every spec side by side.

Motorola · 2026Signature 27

9.7Score

14 advantages

Higher score

Xiaomi · 2026Redmi K90 Ultra

9.6Score

4 advantages≈ $420

9.6Display9.8

9.8Performance9.6

9.8Camera9.0

9.7Battery9.6

9.4Features9.3

Dimensions

Size comparison

Signature 27Redmi K90 Ultra

	Signature 27	Redmi K90 Ultra	Difference
Height	162.1 mm	162.9 mm	−0.8 mm
Width	76.4 mm	77.9 mm	−1.5 mm
Thickness	7.2 mm	8.2 mm	−1 mm
Weight	191 g	227 g	−36 g

Drawn to the same scale from the official dimensions (front and side).

Why is Signature 27 better than Redmi K90 Ultra?

AnTuTu score5,153,294 vs 3,233,695+59%
Storage (max)1,024 GB vs 512 GB2×
Telephoto cameraYes · Redmi K90 Ultra: No
Wireless chargingYes · Redmi K90 Ultra: No
Geekbench 6 (multi-core)12,703 vs 10,224+24%
Selfie camera50 MP vs 20 MP2.5×
4K selfie videoYes · Redmi K90 Ultra: No
Weight191 g vs 227 g+19%
CPU frequency5.01 GHz vs 4.32 GHz+16%
USB version3.1 vs 2+55%
Process2 nm vs 3 nm+50%
Rear cameras3 vs 2+50%

Why is Redmi K90 Ultra better than Signature 27?

Battery capacity7,000 mAh vs 8,550 mAh+22%
Peak brightness6,200 nits vs 9,500 nits+53%
Wired charging90 W vs 100 W+11%
Main camera aperturef/1.9 vs f/1.7+12%

Specifications

Side by side

Only differences	Motorola Signature 279.7	Xiaomi Redmi K90 Ultra≈ $4209.6
Design
Weight	191 g	227 g
Thickness	7.2 mm	8.2 mm
Height	162.1 mm	162.9 mm
Width	76.4 mm	77.9 mm
Frame	Aluminium	Aluminium
Ingress protection	IP68	IP68
Water resistance (IPx)	IPx8	IPx8
Glass protection	Corning Gorilla Glass Victus 2	—
Colours	Pantone: Coal Smoke, Capulet Olive	Black, Blue, Silver
Display
Screen size	6.8″	6.8″
Panel	LTPO AMOLED	AMOLED
OLED panel	Yes	Yes
LTPO (adaptive 1–120 Hz)	Yes	—
Resolution (width)	1,264 px	1,280 px
Resolution (height)	2,780 px	2,772 px
Pixel density	449 ppi	447 ppi
Refresh rate	165 Hz	165 Hz
Peak brightness	6,200 nits	9,500 nits
Screen-to-body ratio	90.2%	90.3%
HDR	Yes	Yes
Performance
Chipset	Qualcomm SM8975 Snapdragon 8 Elite Extreme Gen 6	Qualcomm SM8750-AB Snapdragon 8 Elite
Chip maker	Qualcomm	Qualcomm
Process	2 nm	3 nm
CPU cores	8	8
CPU frequency	5.01 GHz	4.32 GHz
GPU	Adreno 850	Adreno 830
AnTuTu score	5,153,294	3,233,695
Geekbench 6 (multi-core)	12,703	10,224
Memory
RAM	16 GB	16 GB
Storage (max)	1,024 GB	512 GB
Storage (base)	256 GB	256 GB
Storage type	UFS 4.1	UFS 4.1
Memory card slot	No	No
Camera
Main camera	50 MP	50 MP
Main camera aperture	f/1.9	f/1.7
Main sensor size	1/1.28"	1/1.55"
Rear cameras	3	2
Optical stabilisation	Yes	Yes
Ultra-wide camera	Yes	Yes
Telephoto camera	Yes	No
Optical zoom	5×	—
Max video	8K	8K
4K video frame rate	60 fps	60 fps
Selfie camera	50 MP	20 MP
4K selfie video	Yes	No
Battery
Battery capacity	7,000 mAh	8,550 mAh
Battery type	Si/C	Si/C
Wired charging	90 W	100 W
Wireless charging	Yes	No
Wireless charging power	50 W	—
Reverse wireless charging	Yes	—
Connectivity
5G	Yes	Yes
eSIM	No	No
Dual SIM	Yes	Yes
Wi-Fi standard	Wi-Fi 7	Wi-Fi 7
Bluetooth	6	5.4
NFC	Yes	Yes
USB	USB Type-C 3.1 Gen2	USB Type-C
USB version	3.1	2
Video output	Yes	—
Ultra Wideband	Yes	—
Infrared port	—	Yes
Dual-band GPS	—	Yes
Satellite navigation	GLONASS, GALILEO, BDS, NavIC	GLONASS, GALILEO, BDS, QZSS, NavIC
Features
Stereo speakers	Yes	Yes
3.5 mm headphone jack	No	No
Fingerprint sensor	Under display, ultrasonic	Under display
Sensors	Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass	Fingerprint (under display, optical), accelerometer, proximity, gyro, compass
Software
OS at launch	Android 17	Android 16
Platform	Android	Android
Interface	—	HyperOS 3
Major OS updates promised	7	—