Does this apply to castes as well? I mean in western Europe you can often pick out the classism based on how people dress, have their hair and what their accent is (I'm very obvious because of my "provincial" accent and terrible sense of style, lol).

Classism in the Netherlands isn't too bad though, unless you're from the old aristocracies (they live in certain areas, go to private schools, often have archaic letter combos like Y, AE, CK, or apostrophes in their multi-word surnames, etc [1]), they definitely live on their own island. Often end up in politics, too, because so it goes.

[1] https://nl.wikipedia.org/wiki/Lijst_van_Nederlandse_adellijk...