"The visual design works well at 720p and the bump to 1080p allows smaller details to shine but it might surprise you how subtle the jump in pixel count can appear in many scenes. Aside from these minor visual tweaks and the increase in resolution, there isn't much else in the way of visual enhancements."
"Visuals aside, there is another major enhancement worth discussing - loading times. Starting the game has a 40 second loading time with DKC running from disc on Wii U, which is cut down to a mere 11 seconds on Switch."
So a minor upgrade in graphics, but it loads a lot faster. Wish they'd thrown in DKC: Returns with it, considering it's a full price release.