Nobody has mentioned the polyphony of the two keyboards. I don't know what the Casio is but the Yamaha PSR3000 is 128. Can someone tell us what the Casio MZ polyphony is?
George Kaye
Kaye's Music Scene
Reseda, California
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George Kaye
Kaye's Music Scene (Closed after 51 years)
West Hills, California
(Retired 2021)