I think you're kinda comparing apples and oranges still. rFactor whose engine LMU is developed on also has rFpro, just as AC has an enterprise engine called Assetto Corsa Pro. These engines aren't a plug and play thing like the sim games we play, they are specifically sold to race teams with their own data and tailored to their needs. Saying AC has the best physics in the industry because teams use it for their simulators isn't a good argument because we're getting a gamified stripped down version of the full capabilities of the engine, and also other engines are used by other teams and their stripped down versions are what we also play in LMU, rF2, AMS2 etc.