A 964 Rs is great on track, but not much fun on a bumpy B road if you want to stay on your side of the road! That is why I have had 993 RS' alongside my 4/4 for the last 20+ years. A pairing that works for me.
I know my friend had 964RS and he preferred to drive my 930 on the road, in fairness I would only use the 964RS on the track.......never been in a 993RS..