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

vivo Y51 (2020, September)

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	2020, September 15
Status	Available. Released 2019, July	Available. Released 2020, September 19

Body
Dimensions	159.5 x 75.2 x 8.1 mm (6.28 x 2.96 x 0.32 in)	159.3 x 75.2 x 8.7 mm (6.27 x 2.96 x 0.34 in)
Weight	179 g (6.31 oz)	186.7 g (6.60 oz)
Build	Glass front, plastic back, plastic frame
SIM	Nano-SIM + Nano-SIM	Nano-SIM + Nano-SIM

Display
Type	Super AMOLED	Super AMOLED
Size	6.38 inches, 99.9 cm2 (~83.3% screen-to-body ratio)	6.38 inches, 99.9 cm2 (~83.4% screen-to-body ratio)
Resolution	1080 x 2340 pixels, 19.5:9 ratio (~404 ppi density)	1080 x 2340 pixels, 19.5:9 ratio (~404 ppi density)
	Always-on display

Platform
OS	Android 9.0 (Pie), Funtouch 9	Android 10, Funtouch 10
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 (uses shared SIM slot)
Internal	64GB 6GB RAM, 128GB 4GB RAM, 128GB 6GB RAM, 256GB 6GB RAM	128GB 4GB 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) 2 MP, f/2.4, (depth)
Features	LED flash, HDR, panorama	LED flash, HDR, panorama
Video	1080p@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 (under display, optical), accelerometer, gyro, proximity, compass

Battery
Type	4500 mAh, non-removable	4500 mAh
Charging	18W wired	18W wired

Misc
Colors	Diamond Black, Skyline Blue, Cosmic Green	Mystic Black, Jazzy Blue, Dreamy White
Models	1907, V1907, 1907_19, V1913A
Price	About 230 EUR	About 180 EUR