Both iPhone and iPhone 4S have great cameras, but I have recently tested 4S camera vs Sprints Epic Touch 4G(Samsung Galaxy S 2) and couldnt find discernible quality differences that would make iPhone 4S stand out.
Furthermore I loved the fact that Samsung's Camera software allows you to specify the ISO and focus mode(spot/center/etc) whereas neither Camera+ nor iPhones Camera app provides for ISO manipulation(I dont recall if Camera+ allows specifying focus modes) -- this could be a limitation of iOS SDK.
Furthermore I loved the fact that Samsung's Camera software allows you to specify the ISO and focus mode(spot/center/etc) whereas neither Camera+ nor iPhones Camera app provides for ISO manipulation(I dont recall if Camera+ allows specifying focus modes) -- this could be a limitation of iOS SDK.