Graham, you are right and wrong...You are correct that the "morph" on VA's ,it is designed to quickly change all the accompanient parts..It is a great way to get good results..in real time..
You are wrong that Roland can not change individual parts..My G1000 can just like the Korg, but not in realtime on the fly..same with Korg...I never looked to see if the VA-7 could change each part in user style edit, but I would bet that it can...Morphing is just a better realtime feature for "live" situations..