In the Switch 2 Welcome Tour app they even have demos to highlight the improvement in the screen quality compared to the switch
OLED is probably better overall but it can be harder to use in bright sunshine and you have the risk of burn-in if you accidentally leave the screen turned on for hours or something.
We have two switches in our family, both first gen, one usual and one oled. Standalone, usual screen is bearable, compared to oled it is quite bad, but if the new screen is even worse?? I can’t find any explanation for this except of greediness from Nintendo