Vivo X21 vs Asus ZenFone 5Z (ZS620KL) comparison

Show Only Differences Highlight Differences	Vivo X21	Asus ZenFone 5Z (ZS620KL)
ratings
Overall NDTV Rating	Read Review	Read Review
Design Rating
Display Rating
Software Rating
Performance Rating
Battery Life Rating
Camera Rating
Value for Money Rating
key specs
Display	6.28-inch	6.20-inch
Processor	Qualcomm Snapdragon 660	Qualcomm Snapdragon 845
Front Camera	12-megapixel	8-megapixel
Rear Camera	12-megapixel + 5-megapixel	12-megapixel + 8-megapixel
RAM	6GB	6GB
Storage	128GB	64GB
Battery Capacity	3200mAh	3300mAh
OS	Android 8.1	Android 8.0
Resolution	1080x2280 pixels	1080x2246 pixels
general
Brand	Vivo	Asus
Model	X21	ZenFone 5Z (ZS620KL)
Release date	March 1, 2018	February 1, 2018
Launched in India	Yes	Yes
Form factor	Touchscreen	Touchscreen
Dimensions (mm)	154.50 x 74.80 x 7.40	153.00 x 75.65 x 7.70
Weight (g)	156.20	165.00
Battery capacity (mAh)	3200	3300
Removable battery	No	-
Fast charging	Proprietary	Proprietary
Colours	Black, Gold	Midnight Blue, Meteor Silver
Body type	-	Metal
display
Screen size (inches)	6.28	6.20
Touchscreen	Yes	Yes
Resolution	1080x2280 pixels	1080x2246 pixels
Aspect ratio	19:9	18.7:9
Protection type	-	Gorilla Glass
hardware
Processor	2.2GHz octa-core	octa-core (4x2.7GHz + 4x1.7GHz)
Processor make	Qualcomm Snapdragon 660	Qualcomm Snapdragon 845
RAM	6GB	6GB
Internal storage	128GB	64GB
Expandable storage	Yes	Yes
Expandable storage type	microSD	microSD
Expandable storage up to (GB)	256	2000
camera
Rear camera	12-megapixel (f/1.8, 1.4-micron) + 5-megapixel (f/2.4)	12-megapixel (f/1.8, 1.4-micron) + 8-megapixel (f/2.0, 1.12-micron)
Rear autofocus	Phase detection autofocus	Phase detection autofocus
Rear flash	LED	Dual LED
Front camera	12-megapixel (f/2.0)	8-megapixel (f/2.0, 1.12-micron)
software
Operating system	Android 8.1	Android 8.0
Skin	FunTouch 4.0	ZenUI 5.0
connectivity
Wi-Fi	Yes	Yes
Wi-Fi standards supported	802.11 a/b/g/n/ac	802.11 a/b/g/n/ac
GPS	Yes	Yes
Bluetooth	Yes, v 5.00	Yes, v 5.00
NFC	No	Yes
Infrared	No	-
USB OTG	Yes	Yes
Micro-USB	Yes	-
Headphones	3.5mm	3.5mm
FM	No	Yes
Number of SIMs	2	2
USB Type-C	-	Yes
Wi-Fi Direct	-	Yes
sim 1
SIM Type	Nano-SIM	Nano-SIM
GSM/CDMA	GSM	GSM
3G	Yes	Yes
4G/ LTE	Yes	Yes
sim 2
SIM Type	Nano-SIM	Nano-SIM
GSM/CDMA	GSM	GSM
3G	Yes	Yes
4G/ LTE	Yes	Yes
sensors
Fingerprint sensor	Yes	Yes
Compass/ Magnetometer	Yes	Yes
Proximity sensor	Yes	Yes
Accelerometer	Yes	Yes
Ambient light sensor	Yes	Yes
Gyroscope	Yes	Yes
Barometer	-	Yes

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