In regards to the Kingpin conclusion statements, I still dont have the option on hand, but here is my feedback driving the xb9 and the xb8 identical setups.
The xb9 I have zero expo on the steering whilst on the xb8 I had to dial in 20% expo on the steering initially to get to grips with the steering, then backed it down to 15%, our track is high grip, with good high flow chicanes as well as sweeping and down corners, so you really get a feel to how the car flows through.