I just did a side by side morph of candid's using the same size picture and lined up the hairline/forehead/eyes/nose/jaw, and Adriana and Sara have nearly identical noses. Sara has a tiny bit larger nostril but that's about it.
As for the jaw line there's almost no difference till you look at the width of Adriana's face compared to Sara's (which the jowl is larger thus making the jawline look a tad different). Sure depending on water retention, bad photo-shop, or weight loss it'll change a little, but not that much.
Forehead is nearly spot on
Sara has a very centered proportionate face, whereas Adriana has smaller higher set lips then Sara, and lower set eyes.