The difference is the Amsterdam can hold a lot of supplies, while the Zuiderdam can only hold supplies for about 12 days, for the WC this is the wrong ship.
Good decision, here are some of their comments and these are people ready to enter the presidents club and never complain:
The ports we did see kept changing dates * The food was very poor in taste, quality and selection* Food supplies ran out after 30 days and so menus were changed to accommodate* We ran out of Vodka/Drambuie/whiskey/Baileys/Kalua peanuts and a bunch of other things
That was because of covid, before that most people stayed in their cabin, by their own choice, because they didn't feel good, but you were never thrown in isolation.