Comparison of Xiaomi Redmi S2 (Redmi Y2) and Vivo Y91

Comparison of Xiaomi Redmi S2 (Redmi Y2) and Vivo Y91 [S]ave

Attribute	Xiaomi Redmi S2 (Redmi Y2) ×	Vivo Y91 ×
General
Brand	Xiaomi	Vivo
Launch
Announced	2018-05-01	2018-11-01
Body
Width (mm)	8.1	8.3
Length (mm)	160.7	155.1
Height (mm)	77.3	75.1
Weight (g)	170	163.5
SIM	Dual SIM (Nano-SIM, dual stand-by)	Dual SIM (Nano-SIM, dual stand-by)
Front	Glass	Glass
Back	Plastic	Plastic
Frame	Plastic	Plastic
Network
Technology	CDMA GSM HSPA LTE	GSM HSPA LTE
2G bands	CDMA 800 & TD GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2	GSM 850 / 900 / 1800 / 1900
3G bands	HSDPA 850 / 900 / 1900 / 2100	HSDPA 850 / 900 / 2100
4G bands	1, 3, 4, 5, 7, 8, 20, 38, 40 - Global 1, 3, 5, 40, 41 - India 1, 3, 5, 7, 8, 34, 38, 39, 40, 41	1, 3, 5, 40, 41
Speed	HSPA 42.2/5.76 Mbps LTE-A (2CA) Cat6 300/50 Mbps	HSPA 42.2/5.76 Mbps LTE Cat5 150/75 Mbps
Platform
OS	Android 8.1 (Oreo)	Android 8.1 (Oreo)
Chipset	Qualcomm MSM8953 Snapdragon 625 (14 nm)	Qualcomm SDM439 Snapdragon 439 (12 nm)
CPU	Octa-core 2.0 GHz Cortex-A53	Octa-core (4x1.95 GHz Cortex-A53 & 4x1.45 GHz Cortex A53)
GPU	Adreno 506	Adreno 505
Memory
Card slot	microSDXC (dedicated slot)	microSDXC (dedicated slot)
Internal	32GB 3GB RAM 64GB 4GB RAM	16GB 2GB RAM 32GB 2GB RAM 32GB 3GB RAM
Display
Size (in)	5.99	6.22
Resolution (px)	720 x 1440	720 x 1520
Display Type	IPS LCD	IPS LCD
Battery
Type	Li-Po	Li-Po
Charging	Charging 10W	-
Capcity (mAh)	3080	4030
Main Camera
Main Camera Type	Dual	Dual
Main Camera Properties	12 MP, f/2.2, 1.25μm, PDAF 5 MP, f/2.4, (depth)	13 MP, f/2.2, PDAF 2 MP, f/2.4, (depth)
Main Camera Video	1080p@30fps (gyro-EIS)	1080p@30fps
Main Camera Features	LED flash, panorama, HDR	LED flash, panorama
Selfie Camera
Selfie Camera Type	Single	Single
Selfie Camera Properties	16 MP, f/2.0, 26mm (wide), 1/3.06", 1.0µm	8 MP, f/1.8
Selfie Camera Video	1080p@30fps	1080p@30fps
Selfie Camera Features	HDR, LED flash	-
Comms
WLAN	Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot	Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot
Bluetooth	4.2, A2DP, LE	4.2, A2DP, LE
GPS	+	+
NFC	-	-
Radio	FM radio	FM radio
USB	microUSB 2.0	microUSB 2.0, USB On-The-Go
Sound
Loudspeaker	+	+
3.5mm jack	+	+
Features
Sensors	Fingerprint (rear-mounted) accelerometer compass gyro proximity	Fingerprint (rear-mounted) accelerometer compass proximity
Misc
Colors	Gold Gray Mesmerising Blue Rose Gold Stunning Black	Ocean Blue Starry Black
Models	M1803E6G M1803E6H M1803E6I	1811 1816 1817 1820 PD1818BF_EX
SAR Head (W/kg)	0.43	1.28
SAR Body (W/kg)	1.58	0.61
Infrared port	Yes	-