Just gave the 2 new cars a whirl around Sebring and the new Essington for several laps each. I'm liking the new physics. I think I prefer the white one a bit more, though to be honest, I don't see a huge difference between the two other than the heavier steering in the black car.
At first, I noticed the same exact braking issue I had with the original release with both of these, but as I drove them more (I also noticed this with the original last night) I found that the brakes just work a little bit faster than the ISI cars. With the Vette, for example, I can push the brake to the floor and it won't lock immediately, but with these they lock quickly...and then they slide. It just requires a bit more gentle braking pressure to avoid lock, and that is perfectly fine. So my driving style was mainly to blame for that. I'm beginning to appreciate the finesse required with the Bayro E5 at high-speed braking.
Overall, I like what I see...though I can't tell you which one is better. I would personally choose the white physics, just because of the lighter FFB, but whichever is more realistic is preferable. Maybe a balance strike between the two FFB levels would be perfect? I dunno, either way it is still a great car, and I'm loving it!