As males mature, they develop stronger facial features (on average) than either women or juveniles - heavier brow ridges, more prominent jaws, larger noses, etc. - as well as heavier bone structure in general and heavier musculature. Adult females are more similar to adolescents in these features than adult males are. Delicate facial features are generally considered more attractive. Women with masculine facial features are considered unattractive; males with excessively strong facial features - really large jaws or noses - are considered ugly.
However, there are other features in which they differ from juveniles more than males do (hip width, breasts). The respective sexes have to be compared to juveniles of their own sex to assess degree of neoteny.