AR6 better for all-over cause it's stiffer, but it depends on what kind of flex you like on your skis and what kind of snow you ski on, the ARV is a soft ski, but very capable nonetheless.  The Motherships are a sick ski too though, depending on the year, they made Flite and Titanium models, the Flite is lighter with more pop, the Titanium version is heavier and stiffer...so again depends on what kind of flex you like.  If I were you I'd get the Mothership Flite in 182 if you can find it.