OUT: The Narrow Margin, The Big Heat, Born to Kill, The Postman Always Rings Twice, Murder My Sweet
The "INs" are better than three of the OUTs (Narrow Margin, Big Heat, and Born to Kill) by having stories, themes, characters and execution that is broader, deeper, more integrated, more full, more detailed, providing overall more substance.
Postman is not a favorite of mine because Ossessione is better and its trial scenes are on the stilted side. Movies like The Wrong Man and I Confess and File on Thelma Jordon and many others go down better than Postman. But postman does have a great romance between Turner and Garfield that cannot be forgotten; and a great feeling of downward momentum.
Murder my sweet is as good as a few now in the revised top 25: Detour, The Setup, DOA and Pickup on South Street.
Meanwhile, when I look through a list of American noirs, the ones that pop out, in addition to those in your lists, old and revised, are films like
711 Ocean Drive
99 River Street
Affair in Trinidad
Lady from Shanghai
All the King's Men
The Big Clock
The Blue Dahlia
Kiss of Death
The Crooked Way
Cry of the City
I'll stop here. There are just so many that can be popped into the machine at any time that are so great.
The exercise in figuring out what makes one "better" to such a degree that it's top 25 rather than top 100 or #1 out of 250 is all but pointless.