Difference between VIVO Y31S 5G and VIVO Y21T ?

	PRODUCT 1	PRODUCT 2
	VIVO VIVO Y31S 5G	VIVO VIVO Y21T
VERSION
Announced	2021	January 2022
Release date	2021	January 2022
NETWORK
Technology	GSM / CDMA / HSPA / LTE / 5G	4G
DEVICE
Dimensions	164.2 x 75.4 x 8.4 mm (6.46 x 2.97 x 0.33 in)
Weight	185.5 (g6.56 oz)	182 (g6.42 oz)
S.I.M.	Dual SIM	Dual SIM
Design	8 MP	8 MP (1080p@30fps)
Other
SCREEN
langfront.Type	IPS LCD,90Hz,	IPS LCD
Size	6.58 inches	6.51 inches
Resolution	1080 x 2408 pixels	720 x 1600 pixels
Protection
PLATFORM
Operating system	Android 11,Funtouch 10.5,	Android 11,Funtouch 12,
Chipset	Qualcomm SM4350 Snapdragon 480 5G (8nm)	Qualcomm SM6225 Snapdragon 680 4G (6nm)
Processor	Octa-core (4x2.0 GHz Kryo 460 & 4xX.X GHz Kryo 460)	Octa-core (4x2.4 GHz Kryo 265 Gold & 4x1.9 GHz Kryo 265 Silver)
GPU	Adreno 619	Adreno 610
MEMORY
Card slot	❌	microSDXC
Internal & RAM	128GB 4GB RAM, 128GB 6GB RAM	128GB 6GB RAM
CAMERA
Main	13 MP + 2 MP	50 MP (f/1.8) + 2 MP + 2 MP
SOUND
Loudspeaker	✔️	✔️
Jack 3,5 mm	✔️	✔️
CONNECTIVITY
Wifi	✔️	dual-band,Wi-Fi Direct,hotspot,
Bluetooth	✔️	5.0
GPS	✔️	GPS,A-GPS,GLONASS,GALILEO,BDS,
NFC	❌	❌
Radio	❌	FM Radio
USB	Type-C 2.0	USB Type-C 2.0
CHARACTERISTICS
Sensors	Fingerprint (side-mounted),accelerometer,gyro,proximity,compass / Fingerprint (lateral),accelerometer,gyroscope,proximity,compass,	Fingerprint (side-mounted),accelerometer,proximity,compass / Fingerprint (side mounted),accelerometer,proximity,compass,
Various	Fast Charging 18W / Fast battery charge 18W	Fast charging 18W - Reverse charging
BATTERY
Type	5000 mAh	5000 mAh

What is the difference between VIVO Y31S 5G and VIVO Y21T ?