Dougal, I can't give you much feedback yet because I haven't driven the car on either set. It's a 308GT4 which is just coming out of a three year restoration. The XWXs are on the standard wheels and the CN36s are on 7-1/2 x 14. I purchased the Michelins because they're the correct tire, and the Pirellis based on the expected superior performance. I do like the look of the XWXs more, and they performed just fine on my 330GTC.