Well first of all you are comparing using an outdated version, you should look up the improvements made with the 1.2 patch and I dont see how less effects makes it look like a whole different game? That seems like an extreme case of hyperbole.
"Omg look at how many fewer electrical sparks, dust particles and hair follicles are in the Switch version! Completely different game!"
Exactly. Also he is going of a youtube video too and a outdated one. 1.2 really improved the resolution.