Diki,
it has been nearly 4 years since I had my PSR3000 so it is hard to answer your question with any reliability. That said, nearly 100% of my setups from the PSR3000 plays "as is" on the S950. When I look at the OTS voices being used
the keyboard always seems to find the right ones for the songs. Now with my T3 and T4 setups that is not the case and I have to add OTS voices. The accompaniments are pretty good with the T3 and T4 setups without having to mess with them.

I have told several people the S950 is much like a PRS3000 on steroids.

Deane