I was wondering what the differences to Lemmy are, luckily they have this on their website:

Differences between Lemmy and PieFed:

Comments with -10 score are collapsed by default.

Communities are organized into topics. See https://piefed.social/topics.

Image-heavy communities can have a tiled/masonry view, like https://piefed.social/c/pics@lemmy.world

People who get downvoted a lot end up with a ‘low reputation’ indicator next to their name. You’ll know it when you see it.

Hide all posts based on keyword filters. Keyboard shortcuts.

Upvotes in meme communities do not add to reputation.

Better UI design (somewhat subjective!) Improved hotness ranking algorithm (subjective)

Voting is private.

Seems like a few nice QoL changes, but nothing substantial yet. We’ll have to see where it goes in the future.

Personally I’d rather see a sort of P2P Lemmy that gives much more tools for community sovreignty.

Much more automoderation tools, optional automatic deletion tools, custom scoring algorithms, a solid per-community user reputation system that mods can filter/rank posts by, powerful client side content filters (like ML sentiment or topic filters), etc. One that covers anything from private chats, to group chats, to discord-like communities, to fully private Lemmy-like communities to fully public Lemmy-like communities. All in a secure and private manner.

Like a one stop shop for communication, that heavily emphasizes community and user sovreignty, covering anything from ephemeral chats to archival public content. I find the current ActivityPub ecosystem sorely lacking in those regards. We have some of those features but more bolted on rather than baked in.