I'd say they have quite a bit more going for them than just the camera but it looks like your mind is made up. Why not chose another Sony or whichever model you like and meets your needs and expectations,?
Like S Health? Who need that?
I am talking about basic things like camera, battery, stability.
M2 is working perfectly fine for me. Price is affordable and it is very stable device. I will not spend more than 400€ on a mobile phone.
Michael