I'm not familiar with the other similar sites, but Bluesky seems much more interesting as a product than Twitter/X ever did. I think the way they encourage users to build/share custom feeds, and especially how they can be independent of your follow graph, is really interesting. The problem with these sites has always been having a single algorithmic feed controlled by someone else IMO.
Some interesting feeds I've seen are only posts by mutuals, lots of curated feeds that just show a subset of posts by a small number of accounts (whether or not you follow them), a following feed that filters out reposts/replies, a custom open source Discover algorithm based on your likes.
This feels way more interesting to me than anything Twitter/X has ever tried to do, even if you really like their single algorithm and the way their following feed works.