I really enjoyed the former, which is an Egyptian movie that mainly involves a search for missing smuggled dollars in the desert. My review on IMDb is the sole review of that movie.
The latter is a poetic realism kind of noir. One of the German critic reviews goes on at length about this. I quote a few phrases in google translation:
"classic love triangle," Actually a classic triangle, but also a 4th lover who creates two more triangles!
"Coinciding with the first crane movement attracts the director the viewer into its spell and no longer lets go of him from now on. From the Parisian rooftops camera..." The Carne influence.
"But Madeleine is not responding. She has taken her own life." Why?
"In artful flashbacks Käutner unfolds then the whole tragedy of Madeleine's life." And what a flashback structure this is.
"In addition to the extraordinary imagery that plays cleverly with chiaroscuro contrasts and here and there on Orson Welles' masterpiece Citizen Kane reminded Käutner stunned innovative narrative style. He told his drama in the form of multiple flashbacks, leaps in time and changing perspectives. The non-linear narrative technique requires the audience a lot of attention and was the creation time of "Romance in Minor" as an absolute novelty."
The story echoes Madame D. The sets and camera work echo Ophuls but are not as good. Before the story ends, every one of the 4 major characters will suffer or die. Goebbels, to the movie's credit, didn't like it: "Marriage and morals destructive and defeatist"
"A greater compliment could not exist for the fascinating drama of declared Nazi opponent Helmut Käutner. His dark and tremendously moving film about the fatal consequences of adultery is still one for the fixed canon of the best German films."
I didn't like this film particularly. I couldn't get into the performances of two of the leads (Marianne Hoppe and Ferdinand Marian). The other two, however, were great: Paul Dahlke and Siegfried Breuer. The latter is a very notable contributor in "The Third Man". He's Popescu. These two fill out their parts very richly, especially Dahlke. But the Hoppe-Marian affair didn't click in my romance book. Hoppe was so stiff as compared with an actress like Ava Gardner.
This leads me to digress. Did Ava ever commit suicide in a movie? And if she did, was it convincing? There's "On the Beach"! What classic Hollywood actresses could play this part of a mistress and eventually commit suicide convincingly? Many. Ingrid Bergman could do this. Bette Davis certainly could. I think Lana Turner could do this, and Monroe and quite a few others. But suicide seemed to have been verboten by the Code.
Hoppe is unhappily married to Dahlke, a bank accountant. Marian plays a rich composer who sweeps her into being his mistress. Breuer is a spoiler. Dahlke's boss, he gains leverage because he learns that Hoppe is Marian's mistress.