I couldn't find a link for better camera on S7 over edge variant , is it (apparently better results) due to higher resolution (ppi) screen on S7?
I've been using S7 edge around a month now, it has a excellent camera, best I've used on a Smartphone.
The Choice between edge and S7 is pretty simple ; if you need a gorgeous looking device, with a excellent battery life ever on a flagship Android then Edge is a clear choice . If you want a more compact device with better in hand ergonomics S7 is the choice. Edge is just 7gm heavier than S7 & Smallest phone with 5.5 screen.