Not in order of importance:

1. All of the S.A. and Mega voices from Tyros II.
2. Improved harmonizer.
3. Better Direct Access options (like the PSR3000 had)
4. Dedicated Vocal Harmonizer button.
5. Dedicated Talk On/Off button.
6. Dedicated Vocal Effect On/Off button.
7. 3 pedal inputs.
8. Better access for USB drive.
9. Music Finder able to access USB Drive
10. Dedicated Style Creator Button.
11. Ability to load samples.
12. Ability to save sty files as prs, sst, etc. on the keyboard. So when you want to tweak a pro style it doesn't get saved as a different file.

Beakybird