OK so let me explain.
1. Updates
-> Windows App does not notify the user of an update it does automatically updates without any info (changelog)
-> Desktop App notify me if I open the app and I see the changelog
2. Windows App can't be placed on the Windows desktop
--> I see it only in the Windows start menu
3. Icon
--> The Windows App Icon is not the new shiny blue icon ;-)
4. I use a "program starter" app and Windows Apps are not recognized. So I need to start it via the Windows start menu.
5. And so on...