I'm interested to know too. I don't have crack, but I wanna get it. I have done only the PAT quesstions in Kaplan's blue book and Barron's. I feel I need to do a lot more. I'm getting a 20 on Kaplan blue book which is not good.
I thought it was very similar. But I took the test last year, so i dont know how harder/easier PAT has gotten in 1 yr. I would say what you score on Crack PAT will be very similar to what you score on the real thing.