If we're talking strictly ActivityPub, they're exactly the same: servers where your data lives. AT's PDS give you access to your data, but proper AP servers als

If we're talking strictly ActivityPub, they're exactly the same: servers where your data lives. AT's PDS give you access to your data, but proper AP servers also do that: you have your collections, and all your activities in them. The trick is to recognize which software is actually a proper ActivityPub software, and unfortunately Mastodon isn't one of them. The current issue is not with ActivityPub.