The difference is approach. Anarchists will say "this is a scent free space" on the slyer for an event and then if you come wearing cologne, they'll ask you to leave and take a shower before you come back. If you don't have a shower they'll figure it out for you (I have seen this happen). In an anarchist's eyes, the authoritarian version is fining someone for wearing cologne in a certain space or just kicking them out. Do you see how we draw the line?