The two interoperate perfectly. There are some Piefed only features - ~blaze_eu@piefed.social appears as a link to a multi-community (feed) on our end, but I don't think that's supported by Lemmy yet. The developers communicate so I think the plan is to eventually get that working in Lemmy as well.

I also reacted to your post with a smiley face, but on your end you'll just see it as an upvote. There are some more technical issues, such as (if I remember correctly) Piefed supporting the moving of discussion between communities but Lemmy not yet having implemented support for it. Some Piefed communities support making posts in the Q&A format where OP can highlight the best answer, which will just render as a normal discussion with no highlighted answer in Lemmy. But that's really the extent to the incompatibility.

[–] Blaze@piefed.zip 3 points 3 months ago

https://join.piefed.social/features/

[–] A_norny_mousse@feddit.org 2 points 3 months ago

Thanks for taking the time!

It really does sound like piefed is the better reddit-like fediverse experience.

I recently found out that archive services are hardcoded in a really weird way on Lemmy, which makes me a little skeptical.