I don't think Line makes a Prophet 110, I think you mean the Prophet 100 bro.
Anyways, I don't know much about the Head's, but I have a pair of Prophet 100's and they are amazing. Def a big mtn/pow/allmtn ski, I wouldn't recommend them in the mw or ec. They are hellafast, the titanium skeleton inside keeps em stiff and light-they blow the shit out of crud. My only complaint is I want something a little softer for big pow jibbing nxt yr/Hellbents or ep-pros.