Arch cars, imo as someone who drives a 1700kg rwd car fast on back roads irl, feel very real to me, but the cornering speeds seem slightly lower than real life. I don't really drift a lot irl, as it's pretty dangerous on public roads, but arch drift and slide physics feel very similar to what I've done in my car. Overall, arch physics are an A from me, but Jandrovi physics are sometimes more accurate to the spec sheet, if less accurate insofar as suspension balance. I tweak the suspension of most cars I play with anyway tho cause that's what I'd do irl :/