Upgrade to Mini 4 Pro from Mini 4K?

I just got my mini 4k and the drone itself is fine but I'm not really liking the camera quality, so my question is how much better is the mini 4 pro's camera? I don't care too much for the other extra features except for obstacle avoidance, I just want a better camera.

A big thing for me is low light performance, on the mini 4k there's too much grain as you can see from the picture so I'd like to know how much better the bigger sensor is on the 4 pro.

I'm also considering the Air 2s, how does it compare to a mini 4 pro aside from the spec differences?