Really? You don't think so? I haven't seen a forehand ever hit as hard or as cleanly as these two. Especially Del Potro, that thing is like a rocket. On TV not so much but in person, it's monstrous. Berdych has that great windshield wiper action going on with his and he's used that shot to dispose of quite a few good players.
I'm curious, who do you think has a better forehand than these two?