I love BeamNG, but it's a 'vehicular physics sandbox', not a hardcore racing sim. The tyre model isn't refined enough. So, the 2 games aren't competing with each other in that regard.
Having said that, I'm following BeamNG's development with interest. The devs communicate quite well, and they've also taken on board some of the top community modders to be part of the dev team.
Updates are relatively frequent, and it's always fun to see hoe things evolve.