Thanks tommo, you are right my car is not the fastest in the universe. There is an old Skoda on a newly discovered planet named 'Sarcasm' in the Joke galaxy. I was unaware it existed until just recently, but apparently it is faster than my car. Don't I feel foolish!?
A track time is more relevant than the 0-60 mph time. Any fool can floor it from a standstill (albeit some better than others). But around a track a car's in-gear acceleration and handling will show its true colours. Case in point, the Corsa VXR vs the Clio 197; there is only 0.1 seconds between them in a sprint to 60 mph, but when tested by 5th Gear the Clio went around the track over a second quicker. Why? Because the chassis could deal with the power better than the Corsa's.
There is not much between a GP, R53 S, R56 S and R56 S JCW to 60 mph I agree. But fling them all around a track with the same driver and they won't all finish in the same time. This was my suggestion to you to test the statement you made that your R53 S is faster than the R56 S JCW, as how fast the car is seems to be the factor you choose in deciding on what car you have.