Difference between VIVO Y73S and VIVO VIVO Y55 4G ? in United States

	PRODUCT 1	PRODUCT 2
	VIVO VIVO Y73S	VIVO VIVO VIVO Y55 4G
VERSION
Announced	2020	July 2022
Release date	2020	July 2022
NETWORK
Technology	5G	4G
DEVICE
Dimensions	161 x 74 x 7.8 mm (6.34 x 2.91 x 0.31 in)	160.8 x 73.8 x 8.4 mm (6.33 x 2.91 x 0.33 in)
Weight	171.3 (g6.03 oz)	182 (g6.42 oz)
S.I.M.	Dual SIM (Nano-SIM),dual stand-by),
Design	16MP	16 MP (1080p@30fps)
Other
SCREEN
langfront.Type	AMOLED,HDR10,	AMOLED
Size	6.44 inches	6.44 inches
Resolution	1080 x 2400 pixels	1080 x 2400 pixels
Protection		Schott Xensation glass

PLATFORM
Operating system	Android 10,Funtouch 10.5,	Android 12,Funtouch 12,
Chipset	MediaTek MT6853 Dimensity 720 5G (7nm)	Qualcomm SM6225 Snapdragon 680 4G (6nm)
Processor	Octa-core (2x2.0 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)	Octa-core (4x2.4 GHz Kryo 265 Gold & 4x1.9 GHz Kryo 265 Silver)
GPU	Mali-G57 MC3	Adreno 610
MEMORY
Card slot	❌	microSDXC
Internal & RAM	128GB 8GB RAM	128GB 8GB RAM
CAMERA
Main	48 MP + 8 MP + 2 MP	50 MP + 2 MP + 2 MP
SOUND
Loudspeaker	✔️	✔️
Jack 3,5 mm	✔️	✔️
CONNECTIVITY
Wifi	✔️	dual-band,Wi-Fi Direct,hotspot,
Bluetooth	✔️	5.0
GPS	✔️	✔️
NFC	❌	❌
Radio	❌	FM Radio
USB	Type-C 2.0	USB Type-C 2.0
CHARACTERISTICS
Sensors	Fingerprint (under display,optical),accelerometer,proximity,compass / Fingerprint (under screen),optical),	Fingerprint (under display,optical),accelerometer,gyro,proximity,compass,
Various	18W fast battery charging	Fast charging 44W
BATTERY
Type	4100 mAh	5000 mAh

What is the difference between VIVO Y73S and VIVO VIVO Y55 4G in United States?