"I am always amazed at his body type compared to everyone else". The NBA simply did not have many big men at the time. Wilt went up against guys who much smaller than him and could basically do whatever he wanted. If guys like Tim Duncan, Shaq, Dwight Howard, or any other modern elite level big played in that time - they probably would have been as dominant as Wilt. If Wilt were playing today, he wouldn't be nearly as dominant as he was.

MJ would be just as good, if not better, against today's competition.