I have both balls. Just drilled up the Evo, and bought a used, low-mileage Dirty Bomb -- my first experience with either core.
The Evo is going to be a nice piece, I believe. It covers about the same types of lane conditions as my Tsunami, but goes about it a different way. It is cleaner through the front and more angular (which you would expect given it's a pearl). The Evo is drilled label.
My first few pitches with the Dirty Bomb, however, I did not like. I haven't used it enough to see a pattern of what it is/isn't doing, but I'll let you know more when I do. It's going back to league with me this week for some more testing.
I've been warned that the WAS core is much akin to the Buzzsaw core as to who likes it and who doesn't. The Bomb cores, I've been told, are their own deal. You might like WAS/Buzzsaw cores and hate bomb cores.
I've got some work to do before I can make a determination but at this point, I think there's merit in that theory.
Jess
Edited on 5/2/2008 9:42 PM