I'm thinking that b272 is the best yet, as all round, some of the cars{L78/DTM} drive well for a simcade, but when I did my usual Zonda vs Zonda comparison between pcars and Simbin GT power pack, the pcars version still feels centre mounted[vs the more independent feel of Simbin zonda], and lacks the fidelity on the front end and braking.
Also, unless I'm mistaken, the FFB doesn't seem to load much around corners and such, it is well weighted as you exit the pits, but seems to maintain that load, but Simbin does a great job a dialing in weight transfer via FFB loading, and that's on medium FFB settings.
I've never particularly liked the rear grip levels of simbin Z, but pcars is strange, it feels like both rear wheels are stuck to the road, and if you try and accelerate, the whole rear end almost bounces across the track vs a progressive and more independent feeling slide from even the simbin z which has ordinary rear grip behaviour IMO.
Given that rf2's best cars and GSC 2012 tintops are the no1 sims IMO, we can see the problem pcars has from a sim POV if even an ordinary sim car from older GTR evo can still expose many weaknesses in the physics and FFB.
Ok, this is supposedly the console physics/FFB, fair enough, I can wait, especially if things do improve and the BMW's and Fords are amongst those improvements, however, I thought it pertinent to mention my views as people at WMD and elsewhere are still saying silly things like pcars Lotus is comparable to rf2's F1's......but this is simply an outrageous amount of nonsense.
I don't like rf2'S 60F1, I think it's a crazed machine, but it still has a very detailed front end, though it's prone to obscene amounts of understeer in general and in comparison to the magnificent F2{probably the best sim car in existence}, it still has excellent brakes etc, but IMO, doesn't properly transmit power to the chassis.
Between rf2's F2/3/F3.5, BT20, GSC 2012 Camaro, F1 modern, V8SC, and many cars in the simbin range, we have numerous benchmarks to compare any racing game/sim to.
That said, pcars precision with my G27 is close to perfect, though clearly, FFB isn't finished, and they claim wide ranging changes are still on the way.