Well if you wanna better camera both go for s7, if you wanna quick updates as possible go for iphon
Ae 6s, better screen also s7 but if you drop then u will have trouble ( iphone 6s is way stronger than samsung s7).nother thing is ios vs touchwiz, this is same like ubuntu and windows, normally ubuntu will always be quicker than windows because stability of the system = what this means to you?
Well I dont tell you that touchwiz will sucks and lags offten, but it will after some time example after 5-6 months but no severe lag, as I said if you wanna stability of os go for iphone 6s, I must tell you something too till today I got iphone 4 and believe me is smooth like it was before 6 years. And finally thing is battery: samsung s7 won over iphone6s .