There's a huge difference in the cameras.
Go here and select the Mini 4 pro to replace either the far left or right options
https://www.dji.com/products/comparison-consumer-drones
'Better' in what respect? Each has it's individual merits.
You can fly the mini 4 in more places than the mav 3 and it costs a lot less.
The mini 4 camera is excellent and can flip to give you a full frame profile orientation.
The upward tilt...
Don't I know it! I have 5 weeks in Yorkshire!!! :)
Don't think I want to go with a hard bag. I've been that route and it didn't suit me. Thanks though.