BTW one big difference I noticed of FM3 vs FM4 driving the faster cars, is that the new physics model has really improved the ability to drive the fast cars without aids.
With FM3 I usually didn't drive anything S or above because the handling was ridiculous/impossible without using traction control or ABS, so it meant I drove only A or below cars.
With FM4 the new realistic physics have allowed so much more car control that I have been able to drive all the cars so far up to R1 using my wheel + pedals + h-shifter + clutch and right foot braking heel-toe, with no aids on.
It took a while to practice being easy getting back on the throttle but it really feels good and has opened up all the cars above A for me which were useless in FM3 unless you ran with a bunch of helper aids on.
I really miss the Porsches (especially my beloved 959) but I would not trade the new FM4 physics for all the Porsches in my FM3 garage.
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--John
i5-2500k@4.8ghz, Asus P8Z68-V Pro/Gen3, 8GB G.Skill@1600, Noctua D14, X-Fi TitaniumHD
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TrackIR4, Saitek X52Pro + Pro Rudders + Cessna Trim Wheel (sim flying)
Fanatec GT2 + G27 pedals (sim racing)
PSN/XBL/Steam/EA/ProjectCARS: Kludger
iRacing/rFactor2: Joao Silva