Female character wings are noticeably smaller in compared to the males. This ruins aesthetic choices that players make simply because they receive 50% of its potential to its male counterpart. It goes unsaid that character styles play a big role in the game, for its what makes each and every character unique. This has been a noticeable problem for over 4 years and devs simply turn a blind eye towards it.
Not a bug. Every style piece is customized to fit each body shape/size to minimize clipping. For example with the posture on the Flirty personality for females, large wings would clip straight through the legs and poke out of your kneecaps.