I also agree with grip size being big.
I went with 4 1/4 because I wanted to try the smaller grip thing, but after installing the head tour leather grip it felt as big, or slightly bigger than a 3/8!
I ended up ordering some TW private label leathers in the thinnest possible make, and that helped a bit. With over grip, it feels like a stock 3/8 with no over grip.
As for stiffness, it's rated 62 and the pro is 66, but it doesn't feel softer than the pro. I've got a gut/lux rough hybrid of 50/48 in it right now. I do enjoy the racquet.