Do I need to buy 2008 Schweser Notes?

I have 2007Schwester Notes for level 1 and the six curriculum books for 2008 June test, could any one tell me do I still need to buy 2008 Schweser Notes for level 1? Also what is the difference between 2007 Schwester Notes and 2008 Schwester Notes? Thanks a lot!!

just compare the LOS’s from the website

Thanks a lot