Our pace is fairly similar though you are likely faster as RBR and Interlagos are two of my stronger tracks. I can barely turn a lap at Suzuka, Big Willow, Fuji, Autopolis for example.
Interlagos, yeah, two easy wins in B rooms then I had a hell of a battle with 3 A drivers for the win, finished 3rd and then was pushed down to 16th cos I put the softs on twice by mistake


. So annoying, could have SWORN I started on mediums but whatever.
The Lexus is very nice around Interlagos but I get EATEN ALIVE exiting the last turn, losing a solid 6/10ths by T1. I make it up in sector 2 but passing is damn near impossible. Aston the complete opposite, I am slightly slower but it eats cars on the main straight.
As a side note, the bias towards race C is seriously annoying. 3 races and my SR went from 40 to 93, like really??? You can grind for a week in Race A or B and not climb more than 20 points. It's ridiculous.