Hi Depo,
my old 9000pro had this feature and I missed it on the Genos, too. You have one registration with R1 and R2 programmed and if you change anything, it automaticly goes right. While Playing you simply switch between R1 and R2.
I do it the following way: I still program both voices togther with all other settings (mixer, DSP etc) on registration slot 1. Than switch to the other voice and program that on registration 2.
If you want and have a spare pedal, you can now use registration sequences to switch with a tap of your foot.
yours
Rainer