Using Version 184.108.40.206 (Official build) canary (64-bit)
The padding on various elements in the interface feels a bit much. Maybe this is to acomodate a more touch friendly interface, but just to compare to Chrome I've attached some screenshots.
These are just a few examples. The navigation/address bar itself is taller, the downloads bar at the bottom of the screen is taller, etc.
This certainly isn't a dealbreaker for me but I figured I'd point it out.
I notice that when switching between desktop and tablet mode, there is no UI change in Edge Canary. Padding doesn't change size at all, so no separate tablet and desktop mode yet.