It's great in iRacing, there seem to be some big differences in either car or track though compared to pCARS...
Was talking to a mate a bit ago and he'd done some driving of the Radical SR8 in pCARS around Suzuka and said the WR was a 1:46.5, in iRacing the WR for the same combo is a 1:54.606.
Not sure which is more accurate as I couldn't find any real life radical times to compare with, and also not sure if it's because one is much faster than the other, or if the pCARS version of Suzuka is just plain wrong, who knows, but thought it was interesting nonetheless.
I do keep meaning to fire up pCARS again but can never be bothered when iRacing is just there