Tony, first I need to say I have no suitable answer. I ran into the same issue moving from the KN7000 to the PA3X. I found that I could use multiple performances or Song Book entries for the same song with the PA3X and increment performances to get a different style in the middle of a song, but I never was completely satisfied with the result.

It is certainly a let down moving from Technics to Korg. I finally decided the PA3X was not for me. I am back to the KN7000's and the Roland BK5 (which is not as versatile as the Korg). I hope you have better luck.