My biggest benefit is working with multiple artboards. As we all know, design now starts with going mobile first. Right from the start there is a mobile view, tablet view, and desktop view.

Other pros

+ Text Styles (Save a font style for h1,h2,h3,p. Why hasn't anybody else done this?)

+ Better color picker because it magnifies to the pixel. Much easier/faster to find colors on text.

+ There's like 10 colors on your active palette. Photoshop is 2.

+ Faster to export images.

+ Duplicate/Copy anything faster than Photoshop.

+ Opens up way faster than Photoshop. Similar to opening a text editor.

+ It's $49 vs $50/month for Adobe CC.