From what I understood iRacing uses 60 Hz FFB loop, which means most of the laser scanned detail goes wasted automatically or is at least not translated to the wheel. When I drive iRacing Silverstone or Lime Rock Park which are the tracks that exist in both games, I don't feel anything significantly better than the corresponding non-laser scanned tracks in rF2.
We need an urgent update to dx11 of this version... The AC version is nice because is laser scanned, but is good only for solo hotlaps. For serious races we need the 24 hours or VLN version.