Someone else has spotted that Gareth's arms appeared broader than JB's at the convention. As for his tum, as long as it's flatter than Daniel Craig's, that's all that matters. And tums are meant to be a bit round.

He looks great. :)

JB mentioned twice at Comic-Con that Gareth has a big c**k. I wonder if Gareth was a bit freaked out by that? :)