Okay, back to the fan boi closet. You're a soiling a discussion on severe nerditry by resorting to severe nerditry. But congrats on making yourself more meta than meta.

In the broadest sense of "people go into space to investigate something" they're similar|

Really? Since when have you seen either film, because neither bear any resemblance to each other.

Rififi is not a noir. It's the first of it's kind, a caper film. Sure, there's dark elements, but there's too much action for it to be a noir.