ON my kn6000 for "Green Dolphin Street" I set one 'Panel Memory' -registration on other kbs? - with a latin style and the voices/tempo/etc. that I want I then another Panel Memory with a jazz style when I want to switch from one to another I use a fill-in and then press the PM button I want ... transitions nicely ...

PS ... doesn't work quite as well for 3/4 to 4/4 ...