It has the better feature set and UX. Some things I like:

• Threaded comment replies (though they display differently from Lemmy’s).
• Antennae for discoverability.
  • Can use hashtags AND keywords.
  • Can filter results by instance.
  • Can create multiple timelines to display content in.
• Customizable UI via widgets.
• I think the theming options are better.
• Full-text search.
• Quote posts.
• Cat mode.