Which CFA 2008 official sample exams are the most difficult??

Hey guys, any of you have tried the CFA 2008 official exams and how are they compared to schwesers?? Any comment will be appreciated.

i havent done any yet but from what i understand they are slightly more difficult and highly recommended in order to adapt to the way cfa words there questions. im starting cfa’s exams in a few days…almost done schweser