Difference between SAMSUNG GALAXY A51 5G and SAMSUNG GALAXY M51 ?

	PRODUCT 1	PRODUCT 2
	SAMSUNG SAMSUNG GALAXY A51 5G	SAMSUNG SAMSUNG GALAXY M51
VERSION
Announced	2020	2020
Release date	2020	2020
NETWORK
Technology	5G
DEVICE
Dimensions	158.9 x 73.6 x 8.7 mm
Weight	187 g	213 g
S.I.M.	Single SIM (Nano-SIM) or dual SIM hybrid (Nano-SIM),dual watch),	Double SIM
Design	32MP	32MP
Other
SCREEN
langfront.Type
Size	6.5 inches	6.7 inches
Resolution	1080 x 2400 pixels	1080 x 2340 pixels
Protection	Gorilla Glass 3	Gorilla Glass 3

PLATFORM
Operating system	Android 10,One UI 2,	Android 10,One UI 2.1,
Chipset	Exynos 980 (8nm)	Qualcomm SDM730 Snapdragon 730G (8nm)
Processor	Octa-core (2x2.2 GHz Cortex-A77 & 6x1.8 GHz Cortex A55)	Octa-core (2x2.2 GHz Kryo 470 Gold & 6x1.8 GHz Kryo 470 Silver)
GPU	Mali-G76 MP5	Adreno 618
MEMORY
Card slot	microSDXC	microSDXC
Internal & RAM	128GB 6GB RAM, 128GB 8GB RAM	128GB 6GB RAM or 128GB 8GB RAM
CAMERA
Main	48 MP + 12 MP + 5 MP + 5 MP	64 MP + 12 MP + 5 MP + 5 MP
SOUND
Loudspeaker	✔️	✔️
Jack 3,5 mm	✔️	✔️
CONNECTIVITY
Wifi	✔️	✔️
Bluetooth	✔️	✔️
GPS	✔️	✔️
NFC	✔️	✔️
Radio	FM Radio	FM Radio
USB	2.0,Type-C 1.0,	2.0,Type-C 1.0,
CHARACTERISTICS
Sensors	Empreinte digitale (sous écran, optique), accéléromètre, gyroscope, proximité, boussole ANT +	Fingerprint (lateral),accelerometer,gyroscope,proximity,compass,
Various	15W fast battery charging	25W fast charging,100% in 115 min - Reverse charge,
BATTERY
Type	4500 mAh	7000 mAh

What is the difference between SAMSUNG GALAXY A51 5G and SAMSUNG GALAXY M51 ?