Bought my S before there was a non-S, in fact before there was an S in the US, and have always been very satisfied with the car.

Re MPG, on track in the 9-10 range and high 20's with moderate highway speeds, 70ish. No non-S mileage checks but the one I drove briefly was OK in my opinion, better than expected in fact.

If you are interested in SCCA autocrossing the S is in SS where it is seldom competitive whereas the non-S is in AS where I think it can be fairly competitive.

Both fine Porsches!

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Formerly 914Geezer