The rear wing of the AI cars of the FR3.5 variety seems to switch between low/medium downforce and high downforce between the A and B LOD stages. The switch is most easily seen in the game but I attached a screenshot where you can see the white car with the A LOD and the lower downforce version of the wing. Just in front of it is the green car with the higher downforce wing. In the car selection upgrade screen I chose the High Downforce package for my car - perhaps that carried over to the LOD B but not the LOD A? View attachment 3010
Andreas you mistake FR3.5 with FormulaISI, Formula Renault3.5 cars are usualy not equiped with a DRS system.
Yes I see the same thing, it seems to be independent of the downforce package you choose for your car. There are 3 difference downforce packages and each have 3 LODs, looks like some may have been mixed up or wrongly named. The 'B' LOD definitely looks like a higher downforce model compared to the 'A' LOD. Easy enough to put it in devmode to test albeit tedious.