Pros
Double the Hard Disk to 500gig
Create your own Audio Styles
USB Wireless LAN Adaptor * May not be included depending on your particular area
Ensemble 4 Part Voices
263 More Voices
Updated Vocal Harmony with pitch recognition and stability controls
Time Stretch and pitch Shift for Audio
Audio Multi Pads
New Effects processors
New Organ Section

Cons
40 Audio Styles
3 less drum kits
No USB 3.0 ?
Same Silver Case
No word of a 76 key model
No Touch Screen
Same OS?
Same MusicFinder?
Same LCD Display (640 x 480)
No IPad Integration???