By ultra, do you mean cinematic? I’m just trying to understand.
It appears that your car lacks surface cache representation, I’d definitely do the surface cache visualization and see what it’s telling you. For lumen to look passably similar to the path-tracer, you’re going to want hit lighting reflections, which do not appear enabled in your video either.
Lumen is alas not a 1-1 match for the path-tracer, and for best results you’re going to want analytical light coverage so that lumen can do good highlights in reflections.