Some - well, quite a few - years ago I flew most weeks from FFaM to Paris CdG, which meant we had a choice of Lufthansa or Air France.
We always had Business Class tickets: Lufthansa put us in with Economy Class but Air France put us in First Class. No prizes for guessing who got our trade !
Being retired such things no longer concern me: when I do fly these days it's always in FR Class as I'm paying..