The Korg does not work like the Roland G's..Casio had a model in 1987[I think it was a CT6500 or a CT7000] that worked real time..It was not as flexible as the advanced design Roland Chord sequencer..I do not recall if the MZ2000 works like the old 87 Casio model...

AJ have you tried the MZ ..recording say the 1st verse into the sequencer live and immediately looping it while you play over it...The old Casio did this but the fills and variations were not available and you could not change the styles while playing back..like the Roland...

I looked at it as a "sample and hold" function on the Casio..