Difference between VIVO S9 and VIVO Y54S ? in United States

	PRODUCT 1	PRODUCT 2
	VIVO VIVO S9	VIVO VIVO Y54S
VERSION
Announced	2021	November 2021
Release date	2021	November 2021
NETWORK
Technology	5G	4G
DEVICE
Dimensions	158.4 x 73.9 x 7.4 mm (6.24 x 2.91 x 0.29 in)
Weight	173 (g6.10 oz)	188.4 (g6.63 oz)
S.I.M.	Dual SIM	Dual SIM
Design	44 MP (4K@30fps) + 8 MP	8 MP
Other
SCREEN
langfront.Type	AMOLED,90Hz,HDR10+,	IPS LCD
Size	6.44 inches	6.51 inches
Resolution	1080 x 2400 pixels	720 x 1600 pixels
Protection

PLATFORM
Operating system	Android 11,OriginOS 1.0,	Android 11,OriginOS 1.0,
Chipset	MediaTek MT6891Z Dimensity 1100 5G (6nm)	MediaTek MT6833 Dimensity 700 5G (7nm)
Processor	Octa-core (4x2.6 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)	Octa-core (2x2.2 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
GPU	Mali-G77 MC9	Mali-G57 MC2
MEMORY
Card slot	❌	microSDXC
Internal & RAM	128GB 8GB RAM, 256GB 12GB RAM	128GB 6GB RAM
CAMERA
Main	64 MP + 8 MP + 2 MP	13 MP + 2 MP
SOUND
Loudspeaker	✔️	✔️
Jack 3,5 mm	❌	✔️
CONNECTIVITY
Wifi	✔️	✔️
Bluetooth	✔️	5.1
GPS	✔️	GPS,A-GPS,GLONASS,GALILEO,BDS,QZSS,
NFC	✔️	❌
Radio	❌
USB	USB Type-C	USB Type-C 2.0
CHARACTERISTICS
Sensors	Fingerprint (under display,optical),accelerometer,gyro,proximity,compass / Fingerprint (under screen),optical),accelerometer,gyroscope,proximity,compass,	Fingerprint (side-mounted),accelerometer,proximity,compass / Fingerprint (side mounted),accelerometer,proximity,compass,
Various	Fast Charging 33W / Fast battery charge 33W	Fast Charging 18W / Fast battery charge 18W
BATTERY
Type	4000 mAh	5000 mAh

What is the difference between VIVO S9 and VIVO Y54S in United States?