Genevieve is probably the most timeless I think - I know both a young and a middle aged one but haven’t met a young Audrey yet (or admittedly any Colette’s). Genevieve also has the most diminutive choice which can be a real bonus as she can make it her own depending on her style - Jen, Jenny, Ginny, Jeanie, Evie, Eve, Neve etc
I can see why you like Audrey though - very retro cool, and Colette is very French chic sounding. But overall I try to think “which might be the easiest to live with?” so for the reasons listed above, I swing towards Genevieve. Maybe if I knew young Audrey’s or Colette’s in RL I’d feel differently.