I think the line was
put there intending to note the "budget saving", however I don't think it came across well. Picard and Wesley are from the same "geo-structure". Do they look alike? Perhaps they do to the Benzites.
No, they don't look alike, and the Benzites don't have any trouble telling who is who. Vulcans don't look alike either. Neither do Klingons. But Benzites look alike.