Rubber control tire
If Scotty runs the Vegas race similar to Novak it is a handout rubber tire. CS27. He gives 4 tires and they are marked as a set and are teched. So there is a level field as far as tires go and this year it was a handout traction compound as well. You can buy additional sets for the mains I think it was 2.
That way not trying every insert tire combo under the sun.
I like foam better than rubber.