Like many entries before it, Assassin’s Creed Mirage gives its protagonist several cosmetic options in the form of Outfits and Costumes. Outfits are attire for Basim that changes his look and gives him a new gameplay ability. Costumes are solely cosmetic changes that Basim can equip on any of his Outfits without losing their ability.
Source：https://www.cbr.com/ac-mirage-coolest-outfits-costumes-ranked/
