Again rf and ac fanboys wow shame really.
It's not about fanboys. I'm willing to bet most players/drivers are unbiased and just want the best with no loyalty to any company/developer. But I'm telling you "straight-up", PCars is not a sim in the sense that RF2, GSCE, and IR strive to be. The dynamics are fun, yes, they're not arcade, not at all, but they're simplistic compared RF2, GSCE, and IR, let-alone real life.
It's probably easier for some to notice this in the rain. The car dynamics in the rain are more obvious proof of this "videogame trying to be fairly realistic" type of dynamics rather than "hardcore to real-life as possible".
I've driven F2000s in the rain at Mosport , and F1600s in the rain at Infineon Raceway (Sears Point), and trust me, the driving dynamics in PCars are extremely simplistic. Trust me.
This type of "videogame-ish" vehicle behavior in PCars can also be easy and clearly seen with the karts It's more like a light-weight car than a proper kart. You steer the kart into and throughout the corners like a car not an actual kart. And GSCE does not have as advanced an overall physics engine as RF2, yet GSCE displays better kart dynamics than PCars, so it's not all down to RF2's relatively advanced physics engine, but rather just the ISI physics engine in general.
The overall vehicle dynamics (compared to RF2, GSCE, IR, let alone real-life) are simplified and not a "true", "proper" sim. Again though, I still really enjoy the game, it's EASILY realistic enough for me to enjoy
but it's not on that "hardcore/pro-sim" level, and that is TOTALLY fine with me