I liked Arteta, but Gomes is a better player imo. He can pass and hold the ball as well as Arteta, but where Arteta would drop to the floor (mostly getting a free kick) Gomes will ride the tackle/beat a man/men, and continue advancing or play a better pass. He is also a bit better in the tackle. There's not much in it, but Gomes is a better midfielder.
And EVEN better looking - so that pips it for me.