Nobody gives Forza enough credit for physics and realism.
I recently got Pcars, AC, FH3, and FM5.
FM5 more closely resembles real life driving and racing the best, overall, in my opinion.
AC could be great, if fix the oversteer/countersteer/steering issue and remove blatant understeer from many models. It's nearly impossible to catch once the rear gets free though.
If you ever watched captain slow drifting 600hp cars around TGTT, then you know correcting oversteer isn't supposed to be an exercise in futility.
Pcars I tried for 3 or more hours to make the steering resemble anything like a car...no dice.
Could be great for all I know, either it doesn't like my g920 or it's just a really messed up game.
FH3 is a lot of fun, with the most diverse and amazing car list ever. Better crash physics than any GT game ever made by miles. So much fun it's a crime.
Wheel is a little funny with it but tolerable. Too much oversteer in everything.
FM5 I haven't driven enough for a full analysis, but the balance of suspension and weight transfer is right between "sims" and GT, right where I always wanted it. Oversteer is not only correctable, but you can actually jump into a powerful car and powerslide out of exits as you would in a real car.
I always felt "sims" tend to overplay suspension and other things, ACs floating is no exception, and the tendancy in modern games to make powersliding actually seem difficult is disturbing.
So for now at least, FM is doing the best job of realism, because they got the one thing right everyone else messed up. Oversteer. It's not that hard to control, knock it off "sims". (it makes me wonder if the developers of "sims" couldn't find a good driver?)
Maybe they think it's really hard? Idk...