Hi JCkeeys,
I recently bought the Pro and love it. in addition to what Clif has already mentioned, the Pro has 76 semi weighted keys wich I think give you greater expression when playing.
Hi Don,
the Pro has only 2 additional Styles, which are scat vocal Styles. I personally don't care for them, but you can download them on e-groups converted for the PSR-9000.
Eric
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Genos, PSR-S970, TC Helicon VoiceLive3, Mackie 802-VLZ3 Mixer, 2 Bose L1 Pro16, Electro-Voice ZXA1 Subwoofer