I have a 993 C2 (not 4s) as well as a B5 RS4.
The comments above pretty much sum it up.
The RS4 is quicker point to point, and on bumpy B roads will leave the porker.
However, the 993 gives so much more in terms of driver feedback and enjoyment.
Bear in mind that a 993 pre 96 was only 272 bhp, and after 96 only goes up to something like 285bhp. That said, the engine pulls pretty well and it feels like more than the figures would lead you to believe.
The S has no more power, just wider arches the same as the turbo, and on the 4s I think it has big reds too, but its been a while since I've thought about specs.
Yes they have a dated interior, but I personally like it. It makes it feel like a sports car and not just another euro box full of plastic, carbon, and integrated dials.
I would put the build quality ABOVE that of the RS4, and the fit & finish is every bit as good, despite its age difference.
As it happens I brought mine from Paragon a number of years back. They are a good place to deal with, well respected and easy to deal with. Loan car is not all that much - was a Nissan Micra last time I borrowed it !!
I would suggest you have an independent examination, just for peace of mind. They shift a lot of cars, so can't always be spot on with history of all of them.
To get 3 or more in the 993 requires the rear passengers to have no legs, or the front occupants to put up with less leg room.
The pedals you mentioned are offset to the left. Imagine where the brake is usually in a normal car - that'll be your throttle pedal position...
It doesn't take too long to get used to.
Check which interior the car has.
There are comfort seats, and two sorts of sports seat - early and late. The early ones are the same as the 964 seats, and for the 'larger frame' are more comfortable imo than the later style plastic back seats.
The black interior wears much better than the grey interior, but the grey does look nice when in good condition.
I won't go on any more. If you have further questions by all means pm me and I'll send you my email address.
I have carried out a few mods such as fitting pss9 suspension, HID zenon headlights, and a couple of other minor things.
If you buy one, and your happy now with the look of the outside and the inside, I very much doubt you'll regret it
