Me too, but I'm sure that's what everyone will think of if you mention Quattro Sport. I had no idea there was a TT version with the same name - I can't imagine why they would be in a car museum either.
I used to have an Ur-quattro as a daily driver about 20-something years ago, for about 3 years or so. Awesome car, but compared to a quattro Sport (small q on the quattro btw), it was in a different league. I managed to have a couple of drives in quattro Sports at the time... Mind-bending performance. On paper, they aren't actually that fast, certainly in today's terms, but in reality they could simply walk away from virtually anything on the road. Even my standard quattro was point to point one of the fastest things on the road.