Seeing as you like to compare Apples to Apples, just thought I'd help keep you being a nut! joke
Spymac offer 3Gig of e mail storage and many of the sync functions of isync, you also get 250mb of online storage as standard (idisk type service),and you get blogging (personally not a fan of blogging, but some people like it). So pretty much the only thing you lose is the ability to publish a .mac website (which doesnt interest me in the slightest), and for me being a uk person, i dont get so annoyed all the USA only offers that Apple are keen to advertise on their .mac homepage

OH and it costs an extortionate $39.99 a year! Now how do you like them Apples
jay