I know many items in this list can apply to both, but I've been maining 11 since release and going back to pre-11 builds of 10 genuinely feels like a downgrade:
- Windows Terminal is great
- Settings now covers almost everything, I haven't had to actually go into Control Panel in years
- Explorer has tabs!
- The new context menu loads in items asynchronously. Some people hate it, but I remember how apps would abuse the context menu and bring my PC to a crawl.
- The CPU scheduler is genuinely insanely better with big/little CPUs
- Scaling with windows and monitor management is better
- Auto HDR
- Updated notepad is actually kinda good
- Updated paint is actually kinda good
- Built in WinGet is chefs kiss
- I actually love Fluent design
Again, some of these are on 10, but on 11 it feels like more of a tighter package.
Again, some of these are on 10, but on 11 it feels like more of a tighter package.