Difference between XIAOMI REDMI K20 and XIAOMI REDMI NOTE 4 ?

	PRODUCT 1	PRODUCT 2
	XIAOMI XIAOMI REDMI K20	XIAOMI XIAOMI REDMI NOTE 4
VERSION
Announced	2019
Release date	2019	2017
NETWORK
Technology
DEVICE
Dimensions	156.7 x 74.3 x 8.8 mm
Weight	191 g
S.I.M.	Double SIM
Design	20 MP motorized popup
Other	HDR
SCREEN
langfront.Type
Size	6.39 inches	5.5 inches - 1080 x 1920 pixels
Resolution	1080 x 2340 pixels
Protection	Gorilla Glass 5

PLATFORM
Operating system	Android 9.0 (Pie); MIUI 10	Android 6.0 (Marshmallow),upgradable to 7.0 (Nougat),
Chipset	Qualcomm SDM730 Snapdragon 730 (8nm)
Processor	Octa-core (2x2.2 GHz Kryo 470 Gold & 6x1.8 GHz Kryo 470 Silver)	Octa-core 2.0 GHz Cortex-A53
GPU	Adreno 618
MEMORY
Card slot	❌
Internal & RAM	256 GB, 8 GB RAM ou 64/128 GB, 6 GB RAM	64 GB, 4 GB RAM or 32 GB, 3 GB RAM
CAMERA
Main	48 MP + 8 MP + 13 MP	13 MP - Selfie 5 MP
SOUND
Loudspeaker	✔️
Jack 3,5 mm	✔️
CONNECTIVITY
Wifi	✔️
Bluetooth	✔️
GPS	✔️
NFC	✔️
Radio	✔️
USB	2.0,Type-C 1.0,
CHARACTERISTICS
Sensors	Fingerprint (under display),accelerometer,gyroscope,proximity,compass,
Various	18W fast battery charging
BATTERY
Type	4000 mAh	4100 mAh

What is the difference between XIAOMI REDMI K20 and XIAOMI REDMI NOTE 4 ?