What’s the Difference between Wardrobes and Profile Outfits?

Wardrobes

These are in-story wardrobe choices that offer you the chance to change your MC’s clothing to any of the purchased options while reading the specific story that they were purchased in.

Profile outfits

These, in general, are limited-time promotions where you are presented with the opportunity to purchase both an outfit for the story you are reading and the outfit for your Profile avatar to also wear.