I received the DX board last week. Compared to apple, the keys are physically deeper, travel farther, and feel a little "squishy". (the apple isn't exactly tactile, but the keys bottom-out fast enough to give you a little more feedback than the DX) It's nice to have the normal numpad back.
In other news, I spilled coffee on my *second* apple keyboard today. I'm going to invest in a coffee cup with a lid and try to develop a taste for a more-repairable keyboard.