The soft dip underneath the nose has more detail, darker in the center and lighter around the edges. The nose is more contoured, with more precise nostrils, a bit of shading around the sides of the nose, and increased highlighting on the bridge and tip. They are soft and natural, with no excess shine or bumpiness. The lips blend better with the rest of the skin, eliminating the need to put lipstick on a sim just to make it look like they're not wearing lipstick. I've almost fully retextured the faces, adding lots of contour detail to every area of the face, as well as making the main areas of skin have subtle texturing rather than being perfectly smooth.
Later ones will probably be more awesome desserts. This is still an early version (second one I've done thus far) and I'm sure eventually I'll come out with even better ones - thus the name, Custard.
These files replace the textures for Sims 3 faces with more detailed, contoured versions that make sims look a bit less bland and puddingish.