Wow! this would be great.
I really enjoy GTR and LFS. I am no expert in physics but I feel very comfortable with the car handling and racing in these two games!
I did a comparison of GTR Evolution, LFS, Iracing, latest version of Netkar Pro and GT5P last week - by playing them back to back with my DFGT, mainly to see how the FFB felt and overall physics and driving "feel"
Now I didn't use the same cars in each obviously, but just your average FR and MR cars.
I found LFS the worst of the bunch in terms FFB feel and how the physics felt. It just feels old I guess. Too easy to drift. Sense of speed was ok
NetKar PRO, with the latest changes, it feels good to drive and nice sense of speed. You can slide the cars a bit now and it feels meaty/solid. FFB is improved, but there is a certain kind of "deadness" in the overall feeling that the physics didn't have before the recent changes. You gain some, and then you lose some
Iracing , FFB was decent, but the sense of speed is pretty low, and it still feels odd to drive to me, cars don't seem to slide like I expect. Seems to be the "holy grail" for others, but not to me. The cars feel different, but they also don't feel that different despite the claims of sophisticated modelling
GTR Evo felt ok, decent sense of speed, good but canned FFB effects, physics felt decent, but simple. I mostly drove the road Viper, R8 and Gumpet.
Cars don't feel all that much different to each other in an inner way. Sure some are faster, and some handle differently, but they don't "feel" like different cars
GT5

- FFB feels a bit soggy and lot more numb vs the PC games. I thought the FFB in GT4 was better in terms of snapiness! And you tend to oversteer in certain situations without any warning, was driving the Viper and Tuned Ford GT. But there is a certain feel to it that makes all the cars feel different. Must be a GT thing, because I noticed this in GT4, and not in other games.
There is this "looseness", that I really like, which I felt was lacking in Netkar Pro.
Now the Time Trail felt better than GT5

, weight transfer probably better than the PC sims! And the FFB more snappy like in GT4, but still somewhat numb in the detailing, and lacks some of the effects that Enthusia had, like how the wheel will spin when you let go of it coming out of a turn, to help straighten the car out.