Margot is NOT prettier than Scarlett.
And I’m saying that as a fan of both ladies.
Scarlett literally has a prettier face.
Margot has the all-American tall, blonde, skinny, sharp features thing going. Aesthetically she has everything White America would deem physically attractive all rolled into one (and of course she’s definitely pretty). But Scarlett actually has the prettier features. Like, when they are both older women Scarlett is going to be the one who ages better. Her features are a little softer/rounder which makes you more youthful in general, but especially as you age.