I found Piefed to have some minor refinements to Lemmy, enough so that I moved to it for everyday browsing. Probably the most important for me is the combining of multi-community duplicate posts. The way I browse(All/New) will often result in seeing the identical post crossposted to 5-10 other communities. In Lemmy, it results in endless scrolling of duplicate content, especially if more than one person happens to be doing it at a certain time. In Piefed, when it works correctly, I’ll see only one example of the post and it will offer a dropdown if I’d rather see it from another community. Things like that really help soften the rough edges of the fediverse.

I’ve also heard that it’s more quickly developed than Lemmy but I have no firsthand knowledge of that.

At the end of the day, you can see the exact same feed regardless of which your using so just pick the one that makes your time on the fediverse more pleasant.