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	Compare with vivo S1	Compare with vivo Y51 (2020, December)
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vivo S1

vivo Y51 (2020, December)

Network
Technology	GSM / HSPA / LTE	GSM / HSPA / LTE
2G bands	GSM 850 / 900 / 1800 / 1900	GSM 850 / 900 / 1800 / 1900
3G Network	HSDPA 850 / 900 / 2100	HSDPA 850 / 900 / 2100
4G Network	1, 3, 5, 7, 8, 20, 38, 40, 41 - Asia	1, 3, 5, 8, 40
	1, 3, 5, 8, 34, 38, 39, 40, 41 - China
Speed	HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/150 Mbps	HSPA, LTE

Launch
Announced	2019, July 17. Released 2019, July	2020, December 03
Status	Discontinued	Available. Released 2020, December 07

Body
Dimensions	159.5 x 75.2 x 8.1 mm (6.28 x 2.96 x 0.32 in)	163.9 x 75.3 x 8.4 mm (6.45 x 2.96 x 0.33 in)
Weight	179 g (6.31 oz)	188 g (6.63 oz)
Build	Glass front, plastic back, plastic frame
SIM	Nano-SIM + Nano-SIM	Nano-SIM + Nano-SIM

Display
Type	Super AMOLED	IPS LCD
Size	6.38 inches, 99.9 cm2 (~83.3% screen-to-body ratio)	6.58 inches, 104.3 cm2 (~84.5% screen-to-body ratio)
Resolution	1080 x 2340 pixels, 19.5:9 ratio (~404 ppi density)	1080 x 2408 pixels, 20:9 ratio (~401 ppi density)
	Always-on display

Platform
OS	Android 9.0 (Pie), Funtouch 9	Android 11, Funtouch 11
Chipset	Mediatek MT6768 Helio P65 (12 nm)	Qualcomm SDM665 Snapdragon 665 (11 nm)
CPU	Octa-core (2x2.0 GHz Cortex-A75 & 6x1.7 GHz Cortex-A55)	Octa-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)
GPU	Mali-G52 MC2	Adreno 610

Memory
Card slot	microSDXC (dedicated slot)	microSDXC (dedicated slot)
Internal	64GB 6GB RAM, 128GB 4GB RAM, 128GB 6GB RAM, 256GB 6GB RAM	128GB 8GB RAM
	eMMC 5.1

Main Camera
Modules	16 MP, f/1.8, (wide), 1/2.8", 1.12µm, PDAF 8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (depth)	48 MP, f/1.8, (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 120˚, (ultrawide), 1/4.0", 1.12µm 2 MP, f/2.4, (macro)
Features	LED flash, HDR, panorama	LED flash, HDR, panorama
Video	1080p@30fps	4K@30fps, 1080p@30fps, gyro-EIS

Selfie Camera
Modules	32 MP, f/2.0, 26mm (wide), 1/2.8", 0.8µm	16 MP, f/2.0, (wide), 1/3.06" 1.0µm
Features	HDR	HDR
Video	1080p@30fps	1080p@30fps

Sound
Loudspeaker	Yes	Yes
3.5mm jack	Yes	Yes

Comms
WLAN	Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct	Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Bluetooth	5.0, A2DP, LE	5.0, A2DP, LE
Positioning	GPS, GLONASS, GALILEO, BDS	GPS, GLONASS, GALILEO, BDS
NFC	No	No
Infrared port	No	No
Radio	FM radio	FM radio
USB	microUSB 2.0, OTG	USB Type-C 2.0, OTG

Features
Sensors	Fingerprint (under display, optical), accelerometer, proximity, compass	Fingerprint (side-mounted), accelerometer, gyro, proximity, compass

Battery
Type	4500 mAh, non-removable	5000 mAh
Charging	18W wired	18W wired, 70% in 67 min

Misc
Colors	Diamond Black, Skyline Blue, Cosmic Green	Titanium Sapphire, Crystal Symphony
Models	1907, V1907, 1907_19, V1913A	V2030
Price	About 230 EUR	About 210 EUR