I think it is also missing volumn sliders and mute buttons for the different Acc parts. I'm not sure about how good the sequencer is either. What about Retard?
What about Fade in/out? The i30 has these features.

I also compared the voice recognition with my Korg i30 Vocal Harmnonizer and It sounds as good as the PSR 9000, and also on particular tunes like the intro to "Old Man River" I like the voicing better than on the PSR 9000. Just my humble opinion.
Boo