What are the differences between Shaolin, Wutan and Wing Chun, Kung Fu Styles?

I'm thinking that Wutan is a mix of Kung fu, and that Shaolin seems to be the best form of martial arts, while Wing Chun is slightly more rare and a good fighting style, although Wing Chun is also incorporated into Wutan, just wondering what the main differences are, and what grading the styles give in terms of sash or belts.