Clearly MINISTRY OF FEAR is a fully-fledged noir (overall Noir-o-Meter score: 119) that reeks of espionage and surreal treachery. It is also a film directed by Fritz Lang and was released in 1944, so it surely doesn't fit in the cluster of spy noirs that predated and overlapped America's entry into WWII.
ESCAPE IN THE FOG features a strange historical blip wherein a Nazi agent is aiding Japanese spies at a point when the European component of WWII is over! It is much lighter fare than MINISTRY OF FEAR despite its (rather desperate) use of atmospherics (as one of the IMDB reviewers suggests, they really relied on the fog machine for this one!!).
As noted in the NOTW post, many of the spy noirs in the 1939-1942 period are "soft" noirs (for lack of a more precise term--you'll recall I prefer creating gradations and evaluating/ranking on context) and while you are undeniably correct that they play an important bridging role between the proto-noirs in the late 30s and the other homefront influences that introduced alienation, dread, and grief (as masterfully analyzed by Alexander Nemerov in his Val Lewton volume ICONS OF GRIEF), they don't usher in the full-blown "nightmare in normal times" that builds from the confluence of crime, gothic and ever-darker espionage films such as MINISTRY OF FEAR that hit like a ton of bricks in the fateful year of 1944.
CASABLANCA is merely the most famous of these "spy noirs" that the Noir-o-Meter suggests are a little light in the loafers WRT noir elements (as referenced in the closing remarks). When time permits, we may present more of these, but for now, there is much else to work on as we get ready for FRENCH HAD A NAME FOR IT 2...