there are a bunch of important differences:

- can only post in one community at a time.

- separate follow list for communities you’ve joined

- communities have a name, banner, and description and can only be created once (name is immutable, non addressable)

- size of community is counted by number of people who have that community id on their community follow list.

- community posts have a distinct design (shows the community name on top like in X)

- community can have addressable data associated with it via the creator or frost creators (sidebar info like on reddit)