Hi Mark,
I think they should work, some may need revoicing because some of the musikant voices may not available on the normal version keyboards.

I had the Pa4x version of musikant styles for my Pa4x, and I’m reasonably sure they worked ok.
If I remember correctly, some even sounded better on the Pa4x, than equivalent pa3x styles.

Can’t remember if I had them for pa3x or for the pa800 prior to that.