In addition:

- no mic input or vocal harmonizer
- no aftertouch
- non colored screen
- less wattage speaker output (I think)

But the 500 (to me) sounds extremely good too.

zuki
_________________________
Korg PA1000 / Bose Compact L1s (2) / Zedi-6FX / Tascam DP24CD / Encore 300 mics (2) / Zoom Q8 / Senn HD650