In my case there is no transferring as I use all different brands plus vArranger. My wife is using my KN7000 so I am left with:

Nord2 and Korg Micro, used together mostly in my band, as I do all the organ work but need other voices.

Audya 76 is my main board for larger gigs, but have coupled it with my S910 for variety in longer, larger engagements.

Roland BK-9 could actually pull off most jobs once I get it set up more. This board is very under appreciated BTW.

My Yamaha S910 is a sweetheart and used for many smaller, quieter gigs, and plays nice with others, but I usually like a little more punch without being intrusive.

In general, I program each board to be gig ready on it's own
and it depends on many factors, including laziness, as to which ones I choose.