That's why this is such an interesting discussion because I'm pretty sure all of us have at least one film we consider film noir, but doesn't meet every film noir prerequisite, especially those films made before film noir was defined as a genre.
Another thing, people complain about the Oscars today, but how did Going My Way win best screenplay over Double Indemnity? Same can be argued about Best Picture and Director, but the quality of the screenplays aren't even in the same ballpark.
I'm not saying otherwise as I'm just stating my uneducated observations between the two discs.
By the way, I tried listening to the audio commentary with Nick Redman and Lou Dobbs. Let's just say I gave up and will try again at a later time. I do agree with Mr. Dobbs on one thing, that blonde...
Yes, the black levels and shadow detail are much better with the Universal release than the MOC which is even more striking due to how the movie was filmed with so much shadow and darkness a part of the film's mood.