After 2 hours of trying i finally got the game booted up and did some testing with the 4 new cars. Here are my impressions:

Porsche: The best IMO. Feels alive and the feedback is excellent. With the default setup there was a lot of understeer under throttle, but small changes to the setup cured it. I also really like how the car feels under braking.

Audi: Turns in sharply and feels pretty good. For the first few laps the steering had some similarities to the Mercedes. It's hard to describe, but it feels a bit like driving a boat. After a few laps I couldn't feel it anymore though. I think that this is the 2nd best car of the 4 after the Porsche.

BMW: Pretty neutral, but feels heavy. I had some struggles in corner entries, but most likely it's driver error.

McLaren: Feels like the old McLaren. Doesn't really fit my driving style and is pretty unpredictable.

I didn't do any time comparison, but I do think that the BoP is on point.

Julius Kallio - Corvette

Whoops, I almost forgot to register, as usual. 

julbY/Julius Kallio (Trying to change my name ingame, but it doesnt want to change for some reason)

Im changing my car to C7R for this season and I think my number is 64.

I almost forgot to register, I'm in with the Aston Martin!