Vivo V15 Pro 8gb Ram vs Vivo X21

Key Specs

Battery
Battery	3700 mAh	3200 mAh
Display
Display	6.39 inches (16.23 cm)	6.28 inches (15.95 cm)
Front Camera
Front Camera	32 MP	12 MP
Processor
Processor	Qualcomm Snapdragon 675	Qualcomm Snapdragon 660
RAM
RAM	8 GB	6 GB
Rear Camera
Rear Camera	48 MP + 8 MP + 5 MP	12 MP + 5 MP

Battery

Capacity
Capacity	3700 mAh	3200 mAh
Quick Charging
Quick Charging	Yes, Fast: 24 % in 15 minutes	Yes, Fast
Removable
Removable	No	No
Type
Type	Li-ion	Li-ion
USB Type-C
USB Type-C	No	No

Design

Build Material
Build Material	Back: Plastic	-
Colours
Colours	Topaz Blue, Ruby Red	Black
Height
Height	157.2 mm	154.4 mm
Thickness
Thickness	8.2 mm	7.3 mm
Weight
Weight	185 grams	156.2 grams
Width
Width	74.7 mm	74.7 mm

Display

Aspect Ratio
Aspect Ratio	19.5:9	19:9
Bezel-less display
Bezel-less display	Yes	-
Display Type
Display Type	Super AMOLED	Super AMOLED
Pixel Density
Pixel Density	403 ppi	402 ppi
Resolution
Resolution	1080x2340 px (FHD+)	1080x2280 px (FHD+)
Screen Protection
Screen Protection	-	Corning Gorilla Glass v3
Screen Size
Screen Size	6.39 inches (16.23 cm)	6.28 inches (15.95 cm)
Screen to Body Ratio (calculated)
Screen to Body Ratio (calculated)	85.17 %	84.93 %
Screen to Body Ratio (claimed by the brand)
Screen to Body Ratio (claimed by the brand)	91.64 %	-
Touch Screen
Touch Screen	Yes, Capacitive Touchscreen, Multi-touch	Yes, Capacitive Touchscreen, Multi-touch

Front Camera

Camera Setup
Camera Setup	Single	Single
Camera Type
Camera Type	Pop-Up	-
Flash
Flash	Yes, Screen flash	Yes, Screen flash
Resolution
Resolution	32 MP f/2.0, Primary Camera	12 MP f/2.0, Primary Camera
Sensor
Sensor	-	CMOS
Video Recording
Video Recording	1920x1080 @ 30 fps	-

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General

Brand
Brand	vivo	vivo
Custom UI
Custom UI	Funtouch OS	Funtouch OS
Launch Date
Launch Date	May 13, 2019 (Official)	May 29, 2018 (Official)
Operating System
Operating System	Android v9.0 (Pie)	Android v8.1 (Oreo)

Main Camera

Autofocus
Autofocus	Yes, Phase Detection autofocus	Yes
Camera Features
Camera Features	Digital Zoom Auto Flash Face detection Touch to focus	Digital Zoom Auto Flash Face detection Touch to focus
Camera Setup
Camera Setup	Triple	Dual
Flash
Flash	Yes, LED Flash	Yes, LED Flash
Image Resolution
Image Resolution	8000 x 6000 Pixels	4000 x 3000 Pixels
Resolution
Resolution	48 MP f/1.8, Primary Camera(2" sensor size, 0.8µm pixel size)8 MP f/2.2, Ultra-Wide Angle Camera(13 mm focal length)5 MP f/2.4, Depth Camera	12 MP f/1.8, Primary Camera(2.55" sensor size, 1.4µm pixel size)5 MP f/2.4, Depth Camera
Sensor
Sensor	ISO-CELL	S5K2L9, ISO-CELL
Settings
Settings	Exposure compensation, ISO control	Exposure compensation, ISO control
Shooting Modes
Shooting Modes	Continuous Shooting High Dynamic Range mode (HDR)	Continuous Shooting High Dynamic Range mode (HDR)
Video Recording
Video Recording	3840x2160 @ 60 fps	3840x2160 @ 30 fps

Multimedia

Audio Jack
Audio Jack	3.5 mm	3.5 mm
FM Radio
FM Radio	Yes	Yes
Loudspeaker
Loudspeaker	Yes	Yes

Network & Connectivity

Bluetooth
Bluetooth	Yes, v5.0	Yes, v5.0
GPS
GPS	Yes with A-GPS, Glonass	Yes with A-GPS, Glonass
Network Support
Network Support	5G Not Supported in India, 4G Supported in India, 3G, 2G	5G Not Supported in India, 4G Supported in India, 3G, 2G
SAR Value
SAR Value	Head: 1.155 W/kg, Body: 0.284 W/kg	Head: 1.180 W/kg, Body: 0.573 W/kg
SIM 1
SIM 1	4G Bands: TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) FD-LTE 2100(band 1) / 1800(band 3) / 900(band 8) / 850(band 5) 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS: Available EDGE: Available	4G Bands: TD-LTE 2300(band 40) / 2500(band 41) FD-LTE 2100(band 1) / 1800(band 3) / 850(band 5) 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS: Available EDGE: Available
SIM 2
SIM 2	4G Bands: TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) FD-LTE 2100(band 1) / 1800(band 3) / 900(band 8) / 850(band 5) 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS: Available EDGE: Available	4G Bands: TD-LTE 2300(band 40) / 2500(band 41) FD-LTE 2100(band 1) / 1800(band 3) / 850(band 5) 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS: Available EDGE: Available
SIM Size
SIM Size	SIM1: Nano, SIM2: Nano	SIM1: Nano, SIM2: Nano (Hybrid)
SIM Slot(s)
SIM Slot(s)	Dual SIM, GSM+GSM, Dual VoLTE	Dual SIM, GSM+GSM
USB Connectivity
USB Connectivity	Mass storage device, USB charging, microUSB 2.0	Mass storage device, USB charging, microUSB 2.0
VoLTE
VoLTE	Yes	Yes
Wi-Fi
Wi-Fi	Yes, Wi-Fi 4 (802.11 b/g/n) 5GHz	Yes, Wi-Fi 5 (802.11 a/b/g/n/ac) 5GHz
Wi-Fi Features
Wi-Fi Features	Mobile Hotspot	Mobile Hotspot

Performance

Architecture
Architecture	64 bit	64 bit
CPU
CPU	Octa core (2 GHz, Dual core, Kryo 460 + 1.7 GHz, Hexa Core, Kryo 460)	Octa core (2.2 GHz, Quad core, Kryo 260 + 1.84 GHz, Quad core, Kryo 260)
Chipset
Chipset	Qualcomm Snapdragon 675	Qualcomm Snapdragon 660
Fabrication
Fabrication	11 nm	-
Graphics
Graphics	Adreno 612	Adreno 512
RAM type
RAM Type	LPDDR4X	-

Sensors

Applications
Applications	Newspoint, Amazon, Paytm, UC Browser, WPS Office	Facebook, WhatsApp, LINE, Google Duo, Gmail, Amazon, Lazada, Flipkart, Maps, Newspoint, WPS Office, UC Browser
Fingerprint Sensor
Fingerprint Sensor	Yes	Yes
Fingerprint Sensor Position
Fingerprint Sensor Position	On-screen	On-screen
Fingerprint Sensor Type
Fingerprint Sensor Type	Optical	Optical
Other Sensors
Other Sensors	Light sensor, Proximity sensor, Accelerometer, Compass, Gyroscope	Light sensor, Proximity sensor, Accelerometer, Compass, Gyroscope

Storage

Expandable Memory
Expandable Memory	Yes, Up to 256 GB	Yes, Up to 256 GB
Internal Memory
Internal Memory	128 GB	128 GB
Storage Type
Storage Type	eMMC 5.1	-
USB OTG
USB OTG	Yes	Yes
User Available Storage
User Available Storage	Up to 113 GB	Up to 107 GB