What is the difference between recording with DJI Goggles 2 and with the camera on the aircraft?

DJI Goggles 2 record the image displayed on its screens (with OSD and other information), and the max specification is 1080p/50fps. 

The DJI Avata and DJI FPV Drone cameras record the image captured by the its camera, and the max specification is 4K/60fps.