Track sizes can be 50MB each with a pro account so you can post higher quality and longer songs.
Upload and entire album worth of tracks at the same time.
Pro accounts can store 5GB worth of music.
Turn off downloads & comments on your tracks with added control and features.
Improved stats gives you more data on visitors and what they did while on your page.
Get a pro badge next to your band name so people know you are a pro account holder.