Oh i don't know it super well but from what i can tell...
- Scheduling
- Drafts, templates and other saved content they call snippets.
- Supports other tokens like those on steem-engine
- Bookmarks
- Lots of cool individualization settings
- Lots of stuff for visual creators (portfolio and slideshow and pop-out images now)
- Favoriting stuff and some nice things in Explore section
- Some notifications but not a ton there.
But that being said steemit seems like the bottom of the barrel... they barely started working on it again after like 2 years of nothing.