Who is better Rodney mullen or chris cole?

Niether is "better" than the other. For one thing, Rodney Mullen and Chris Cole have two different styles and things that they skate, so you can't really compare the two. For another, Skateboarding is all about expressing yourself, and once you reach the pro level, everyone is so amazing that no one is really "better" than another person; it's all about how good you can make tricks look.