Why is it, when looking at pictures of the Yeah Baby core, it looks different than the Impact core. Don't get me wrong, I love my Sure Strike which uses the Impact core, but visually there appears to be a difference. I never had a Yeah Baby, (apparently one of the best balls they made), but now I am very interested in The Xtreme Damage. I'm sure I will wind up getting the Xtreme anyway, just asking if anybody else notices a difference in the 2 cores.