Which is the younger sister?

Betcha can’t tell from the photos below. Happy Birthday to my favorite young woman in the whole world — you look awesome in that sweater!

I’ve a beautiful sis, Julie S.
And she’s older than me, I confess.
But my friends, they all say,
“She’s not fifty, NO WAY!”
It’s her wonderful life — free of stress.
Which is the younger sister?
Here are a couple of oldie-but-goodie photos of Julie from 1960. One is with Mom and one’s with her big sister, Daisy.
Mom and Julie, 1960 Julie and Daisy, 1960