Cat SX - S1

[FERRETTI]

I've had a look through the threads I can find but don't seem to be able to locate the information I'm after on this model.

Please can someone list the part differences between the SX - S1 model and the SX - Phil Booth version, is it simply the composite chassis and steel drive shafts

What impact do the differences have on the performance of the car?

If a thread exists covering this topic please point me in its direction, thanks.