OK... I think I see what you cleverly disguised in your reply. You are nearly as slippery as Yamaha's own ad copy!

When played FROM a graded piano action (not in the P85), the piano SOUND is just as good (though I find that hard to believe, especially from Yamaha!)... Right?

But I believe what I asked was, forget the sound... how does the FEEL of the P85 action differ from the CP300?
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An arranger is just a tool. What matters is what you build with it..!