Super Mario 3D World will be more than just a port when it comes to Switch. In addition to new content with Bowser’s Fury and online play being supported, GameXplain has noticed on other changes as well.
The game runs faster on Switch vs. Wii U around 20-30%m ore, There is an adjusted camera on Switch, as well as Odyssey-style mid-air dive and a more impactful roll added
You can see their comparison video for the Switch and Wii U versions of Super Mario 3D World below.