The old Golden Tee versions used the 3" Imperial, but the new version uses the 3" High Happs. I could be wrong, but this had been talked about before somewhere in this forum.
I'm currently using the 3" Imperial and like it. I haven't used a 3" high enough to know anything about it, other than the ball is sticking more out of the table. I've played the Golden Tee 2003 and didn't really notice a difference.
Good Luck!
TM