That's what I'm freaking talking about!!! Welcome my man. I'm sure Shirley (my ride) wouldn't mind having another twin floating around here.This is going to sound weird but it's based on color:
Silver - Square
every other color - Round
I really like the silver earlier models but all the other colors just look better after 02 to me. I still really enjoy the silver as well, just like it a little more with squares.