I dont think thats a scandinavian DLC pack. I think The Republic simply add new clothes for characters following a merchant/republican path, and that this is simply these new clothes applied to the generic western faces, whereas those we've seen in Venice have darker skin because they are new republican outfits + Mediterranean portrait pack.
I think I've seen screenies with Mediterranean merchant characters sporting the same type of cloaks and hats. They're togas essentially. How about Attorney General minor title that makes the character wear them?