There's barely any graphical difference, the Switch port looks great. Being a super linear, small scale game I think its also one of the easier games to port, so i wouldn't equate with any special effort on the developers part.
You can tell the resolution is smaller, and the textures where cut back.
Plus theres certain effects / shadows missing, view distances are shorter ect.
I wouldnt call that "barely" any graphical differnces, cuz they are there and noticeable.
However its a perfectly fine looking port.
Necro-bump this 2020: http://gamrconnect.vgchartz.com/thread.php?id=229249
Bumb in 2021: http://gamrconnect.vgchartz.com/post.php?id=9047071