Some additional features that PieFed has:

• You can create posts with polls.
• Crossposts shows comments from everywhere that something is crossposted to (organized into their own sections)
• Feeds for combining multiple communities into one.
• You can blur images with spoiler tags instead of having to use NSFW.
• You can tag posts and then filter down posts based on those tags within a community.
• You can set a time/date for when something gets posted.

That's just what I can think of off the top of my head. Otherwise a more complete list can be found here: https://join.piefed.social/features/