I have thought about (nothing final) getting an NBA jersey just to wear casually over a shirt nothing too crazy. Anyone that can tell me the difference between a “swingman” jersey and an authentic one?

MitchellandNess’s retro ones can be cool but are missing a lot of players and their “swingman” colors seem so dead on a lot of jerseys. On top of that the authentic ones are just too expensive.
NBAstore’s and fanatic’s “swingman” look like the authentic and nice quality, but only have recent/current players.

Would prefer a John Wall one but couldn’t find anything. Again nothing final, it’s just to have an idea.