Awesome comparison. It's really down to Spotify and MOG for me. I love MOG's more simplistic but combined playlist + radio features as well as last.fm scrobbling integration. But one thing kills MOG for me -- 500-song limit on playlists. I like to create large playlists and constantly add new music/artists/songs as I find it, essentially turning it into its own massive radio station. <br />
<br />
In turn I use the radio feature to continually find new music. <br />
<br />
If anyone knows a way (or when MOG is planning to remove the 500 song limit) I'd love to know.