Redmi K90 Ultra vs Mi 8 comparison

Show Only Differences Highlight Differences	Redmi K90 Ultra	Mi 8
key specs
Display	6.83-inch	6.21-inch
Front Camera	20-megapixel	20-megapixel
Rear Camera	50-megapixel + 8-megapixel	12-megapixel + 12-megapixel
RAM	12GB	6GB
Storage	256GB	64GB
Battery Capacity	8550mAh	3400mAh
OS	Android 16	Android Oreo
Resolution	1280x2772 pixels	1080x2248 pixels
Processor	-	Qualcomm Snapdragon 845
general
Brand	Xiaomi	Xiaomi
Model	Redmi K90 Ultra	Mi 8
Release date	June 30, 2026	May 1, 2018
Launched in India	No	-
Dimensions (mm)	162.91 x 77.93 x 8.18	154.90 x 74.80 x 7.60
Weight (g)	227.00	175.00
Battery capacity (mAh)	8550	3400
Fast charging	100W Fast Charging	-
Colours	Space Silver, Shadow Black and Sky Blue	White, Gold, Light Blue, Black
Form factor	-	Touchscreen
display
Refresh Rate	165 Hz	-
Resolution Standard	1.5K	-
Screen size (inches)	6.83	6.21
Resolution	1280x2772 pixels	1080x2248 pixels
Touchscreen	-	Yes
Aspect ratio	-	18.7:9
Pixels per inch (PPI)	-	402
hardware
Processor make	Snapdragon 8 Elite	Qualcomm Snapdragon 845
RAM	12GB	6GB
Internal storage	256GB	64GB
Processor	-	octa-core (4x2.8GHz + 4x1.8GHz)
camera
Rear camera	50-megapixel + 8-megapixel	12-megapixel (f/1.8, 1.4-micron) + 12-megapixel (f/2.4, 1.0-micron)
No. of Rear Cameras	2	-
Front camera	20-megapixel	20-megapixel (f/2.0, 0.9-micron)
No. of Front Cameras	1	-
Rear autofocus	-	Phase detection autofocus
Rear flash	-	Dual LED
software
Operating system	Android 16	Android Oreo
Skin	HyperOS 3	MIUI 10
connectivity
Wi-Fi 7	Yes	-
GPS	Yes	Yes
Bluetooth	Yes	Yes, v 5.00
NFC	Yes	Yes
USB Type-C	Yes	Yes
Wi-Fi	-	Yes
Wi-Fi standards supported	-	802.11 a/b/g/n/ac
USB OTG	-	Yes
Number of SIMs	-	2
sensors
Fingerprint sensor	Yes	Yes
Compass/ Magnetometer	Yes	Yes
Proximity sensor	Yes	Yes
Accelerometer	Yes	Yes
Ambient light sensor	Yes	Yes
Gyroscope	Yes	Yes
Face unlock	-	Yes
Barometer	-	Yes
sim 1
SIM Type	-	Nano-SIM
GSM/CDMA	-	GSM
3G	-	Yes
4G/ LTE	-	Yes
sim 2
SIM Type	-	Nano-SIM
GSM/CDMA	-	GSM
3G	-	Yes
4G/ LTE	-	Yes

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