_FAN, the Pre's keyboard is 10x better than the Touch Pro's. I carried the TP for awhile and liked it, but I've been carrying the Pre for a bit now (yeah, that's right) and there's no going back for me.
The ability to have myriad apps open at once and the way the Pre's UI handles switching between them is enough by itself to vault the Pre above other phones. But there's a lot more to it than that.