Honestly? I can't even tell the difference between the 2 anymore. Both EB and Gamestop near where I live are basically the same store, and they both don't follow the apparent "rules" of a normal EB and gamestop stores. No one trying to shove games in my face, no misinformation, no nothing. Surprisingly enough, both stores seem to have mostly girls running the registers.
That being said, I usually go to Gamestop first, this particular store has a much neater set up then EB. EB has this huge wall for PC games, but everything else seems to be hidden in the middle of strategy guides, toys, and poo I usually avoid. Not only that, but they seem to be real slackers with dealing with new shipments. As for Gamestop, they have a nice PC lineup, used and old games, and equal size shelves for all 3 consoles. I haven't had any problems finding rare games at all.
So to this merger... I *shrug*