It looks like Roland does this better..besides changing just the drums and other instruments,,you can swap around any segment of a style..acc 1-6, bass line, intros, endings and fills..Also different divisions[maj,min,7th]..
This can be done even on my oldie keyboard[G1000]..

I always liked to use a boogie bass line with a big band pattern..

The VA series made it quick and easy with morph feature ..all in realtime...
I believe the G70 still has this feature..I know it has the Cover feature that works with SMF and styles..
Maybe Yamaha will catch up someday!!