>>150887257
For me?
Face: Daphne no diffs Velma. Not that Velma can't be facially attractive, but she's supposed to be relatively plain to further drive home the nerd archetype.
Body: Daphne has the more classical "skinny and shapely" look, being ~5'7 and ~120lbs. She's 16, so she'll most likely squeeze in another inch or two. A taller, more lean physique. Perfectly suited to high society sports activities (like tennis), a classical female athlete. Velma is stockier, still retaining an hourglass figure but having broader shoulders, hips, and even ankles & wrists. She is far from dainty. Velma is just under 5' tall, short for a woman, and less than 100lbs. She's the youngest of the group at 15, so she still has quite a bit of growing time left, probably ending up ~5'2 and proportionally heavier.
Breasts: Daphne's are smaller but far perkier, complimenting her taller and slimmer stature. Perky, upturned, and more forward. I'm thinking, hmmm, small nipples. Velma has a broader chest, larger breasts, some sag, some outward orientation, and larger nipples and areolae.
Stomach: Daphne is skinny enough to not have any fat muffin-topping if she were to wear even tight clothing, so she's probably around 20% bodyfat if not slightly leaner. Velma is only slightly fatter, not enough to have a belly but enough to have a soft and pliable midsection with a hint of squeeze.
Hips: Due to Daphne being skinnier, her hips flare out more noticeably than Velma despite Velma's actually being wider due to her accompanying wider midsection.
Butt: Daphne's ass is round, soft, yet capable of great firmness. Velma's is fattier, borderline bubble butt territory, and pear shaped.
Legs: Daphne has longer legs of course, well toned. Velma has considerably shorter ones, perhaps slightly bowlegged and meatier in comparison (but no loose cottage cheese fat!)
Feet: Daphne has appropriate feet for her height and weight, I think this matters the least. But Velma has got some hoofs down there.