Never skied the Zero,
BUT THE JJS ARE SICK
They have camber under foot so you can stil ski them all over the mountain. I have a set of ARVs, and ARGs and I have skied the JJs everyday this season in Jackson except for 2 sick ARG days and we have had 95% groomer days this season..... I prefer it over the ARVs just for all mtn riding now.
IF you can find a set get them. They are a great go anywhere ski, even at 115 under foot.