I think that is the way of doing it. I heard it that you can use pitch bend to play the same notes but with diferent samples to avoid playing the same samples as the first clarinet so instead of hearing two clarinets, you pratically only hear one (not sure if it is like this.), Correct me if I'm wrong, but isn't this matter only for the notes played in unisson? I am new person to VSL community and I know only a little so I might not be the appropriated person to speak here.
Ricardo.