I have both 6s 64gb and 7 128gb . after 2 weeks I posted some views about both phns.
Performance wise both are same not huge difference.
Camera in daylight both are good and in low light camera little bit better not huge difference.
Overall both are superb.
Cons:-
Waterproof but company said water damage they don’t cover under warranty. what is this . if you not cover so why you provide.
Jet black got scratches easily .
And also iPhone 7 don’t worthy upgrade from iPhone 6s . guyzz wait for 7s or 8.