Lots of people thing which device is better iphone or galaxy but I would say both are equal but different in some aspect
CAMERA: S7 has liitle bit good camera than iphone 7 ( only at low light condition)
FLUIDITY: Iphone software are only for iphone level of smoothness is high on the other hand s7 is android device bugs are easily transfer into device due large no. Of apps
DESIGN : both are best .
GAMING: NO DIFFERENCE same.
VALUE FOR MONEY: S7 I would say slithly cheaper than iphone 7