For me I prefer Tony to Joey. ( Joey lite ? com'on man ) Trying to properly describe why is difficult but to keep it simple I find Tony more musical rather than just technical. I've seen them both live and Tony's set was just more enjoyable to me. Like I said hard to describe.
Tonys a real nice down to earth guy. Sat at the bar with him before his set and we had a nice talk, and not just music. I didn't know he was just getting over a Heart Attack so I think since then he's slowed down the touring.
And if anyone wants some good lessons check out his teaching CDs.