May be a repost but EVO magazine did a comparison on a track between the 997.2 C2S and the 997.2 C4S in the wet and cold. End result was that the C4S was about second quicker around the course than the C2S. Both cars were about 10 seconds slower than where they should have been given the wet conditions. Their times were on par with the Audi Q7 that ran the course when dry.

Its a good read given that some buyers here are weighing the differences between the two cars.

Jason

 

Here is the link to the video:

http://www.youtube.com/watch?v=W3uY_MK3muA

The difference is 2 seconds, the C4S being faster (1.36.3 for C2S and 1.34.22 for the C4S)

 

Pretty good read. Read all Porsche mags that Barnes and Nobles had.