Zipp NSW worth the cost?

The comparison between 404 and 454 NSW where the NSW performed markedly worse in terms of aerodynamics would lead me to say “No” unless you want them for the look. Granted the 404 is 3mm deeper but that doesn’t explain a 6W difference at 30kph or 12W at 50kph.

NSW, IMO, is cycling industry marketing at its “best”.