No matter how much exercise you do, no matter how well you eat, if you don't have a prior favorable bone and muscle structure, it's impossible for your body to look as proportional as he does. So yes, much of why his athletic body looks so perfect is due to genetics.
That's why there are some guys whose abs look asymmetrical, and other guys who look more proportional. Even when they have similar exercise and eating routines.
PS: I think he is basically physically perfect, everything, the structure, shoulders, eyes, jaw, arms, abs, chest, back, lips