Which is better: Netherlands Open Air Museum or Enkhuizen Zuiderzee Museum?
what does "better" mean for you?
Could you talk a little about the rest of the trip, who's on the trip, how many kiddoes (ages) and how many seniors, etc.
What would you hope to see?
The two are quite different. I've been to both, though a few years since.
I can only speak to the Enkhuizen outdoor museum as we were there a week ago. It was great. We were two families with total of four kids ages 13-14. Everybody loved it and it was nice the kids could go off on their own. It also helped that the weather was perfect. A subset of our group combined the steam train/boat excursion to the museum. The Netherlands Museumkaart covered everything, even the steam train and boat ride. So as to which museum is better, I can't say, but I also can't imagine you being disappointed in Enkhuizen.