It just has a real delicacy in all areas that the TT lacks. I am sure lower weight helps. TT gearchange is tough from 1-2 and spoils experience, power delivery is less satisfying although the turbos deliver a bigger punch. Of course PCCB are superior. Sound in PD1 is great - got the PSE. Steering is more communicative. In short it is just a lovely car. Interesting also to see that when we drive together through town all eyes are on the PD1!