All of the federated sites push and pull content using ActivityPub (the technology that connects them all together), but they all seem to differ in the way their website presents the data and how you interact with things.
For example there's an upvote / downvote button on kbin.social for articles, but also a boost button. I've heard that some places only use the upvote and others the boost (or whatever they call it)
I found it easiest to just pick a place that looks decent and is chill and go from there 🦙🦙