A central difference of Apple's iCloud versus the others is that it's not just for music: It takes over all the former MobileMe's functions—email, contacts, calendar—along with backing up and syncing iOS device photos, app data, and iWork documents. Thus ends the stormy story of the MobileMe service, which even Steve Jobs noted at WWDC was "not our finest hour." This comparison, though will concern itself primarily with the music aspect of iCloud, iTunes in the Cloud. This piece is available as a beta by downloading iTunes 10.3.
A huge difference of iCloud's music capabilities is that you can't play songs from within a Web browser (at least as far as we have seen so far) as you can with both Amazon and Google's offerings. You'll either need an iOS device or iTunes running on a computer. True, this does include Windows PCs running iTunes, but forget any non-Apple tablets or phones. This lack of Web access is just less flexible. Nor can you stream music from its online storage—the music must be fully downloaded to play. Read More