Looking at that, I think it’s clear quite a bit of DNA is shared. A non-trivial question, though, is who may have, in turn, influenced Mézières, Moebius und Druillet. Star Wars designs may have been influenced by the French artists directly, but could also easily have been influenced by the same older designs that inspired the French artists. Sci-fi art goes way back, as with all art & literature, there’s rarely a simple straight line in the tangled web of relationships. The only certainty is that it would be quite improbable for Star Wars (or the French artists) to feature entirely new designs with no influences from anywhere else.