Difference between XIAOMI BLACK SHARK HELO and OPPO REALME C15 ?

	PRODUCT 1	PRODUCT 2
	XIAOMI XIAOMI BLACK SHARK HELO	OPPO OPPO REALME C15
VERSION
Announced	2018	2020
Release date	2018	2020
NETWORK
Technology
DEVICE
Dimensions		164.5 x 75.9 x 9.8 mm
Weight	190 g	209 g
S.I.M.		Double SIM
Design	20MP	8 MP
Other
SCREEN
langfront.Type
Size	6.01 inches	6.5 inches
Resolution	1080 x 2160 pixels	720 x 1560 pixels
Protection		Corning Gorilla Glass
PLATFORM
Operating system	Android 8.0 (Oreo)	Android 10,realme UI 1.0,
Chipset		MediaTek Helio G35 (12nm)
Processor	Octa-core	Octa-core 2.3 GHz Cortex-A53
GPU		PowerVR GE8320
MEMORY
Card slot	❌	microSDXC
Internal & RAM	256 GB, 10 GB RAM, 128 GB, 6/8 GB RAM	64GB 3GB RAM, 64GB 4GB RAM
CAMERA
Main	Dual 12 MP & 20 MP	13 MP + 8 MP + 2 MP + 2 MP
SOUND
Loudspeaker	Stereo	✔️
Jack 3,5 mm	❌	✔️
CONNECTIVITY
Wifi
Bluetooth
GPS	✔️
NFC
Radio	❌	FM Radio
USB	2.0,Type-C 1.0,	microUSB 2.0
CHARACTERISTICS
Sensors	Fingerprint reader	Fingerprint (rear mounted),accelerometer,proximity,compass,
Various	Fast charge	18W fast battery charging
BATTERY
Type	4000 mAh	6000 mAh

What is the difference between XIAOMI BLACK SHARK HELO and OPPO REALME C15 ?