There is absolutely no difference as far as music goes. One says it was released May 15, 2006, it just might be another pressing or a reissue. Could be that one is lenticular (limited?) and one is not. Amazon is not always correct, whether you'd like to believe that or not ;)
__________________ "You think my lack of tact is bad, which is subjective. Personally I think it's great." -misanthrope