The specs and geomertry look very similar. It's a toss up from that point of view. It really will come down to which one you like to ride or which one is cheaper. Both those being equal, choose the best looking.
The one thing that has always attracted me to GFs is that they tend to have longer top tubes than any other brand's comparable bike. If you are tall and/or long-torso'd, I would let that be the tie-breaker.
Well the problem with me test riding them both is the bike shop does not have them in stock i have to order them so that isnt an option. I like the looks of the Advance better but i weigh 240 pounds and am just starting to ride so dont know much about bikes yet.
I want to get the one with good wheels so i dont bend em going off sweet jumps. My buddy says the Trek wheels are much better then the ones on the Advance. Is this true?