The ARG type ski is the best ski you can get hands down for shredding deep untouched snow in anywhere but massive AK faces...and even there it is pretty damn good. It will make you a much better, more confident skier and you will look at terrain in a whole new light. Seriously, it changed teh way that i looked at skiing, and is the funnest ski ever in deep pow. It will make any type of turn or manuever you want with out ever having to force it even a little. Its super duper poppy too, so you can play around on it even more. Also they are super stiff so they legit charge and blast through crud and mank.
HOWEVER, they are straight up uncontrollable on an icy groomer, especially if its just a patch you hit(the run up to liftlines can be get scraped off easily on pow days making for embarring crashes into netting haha). On anything less than an 8 inch day i would ski park skis, becuase ARG's wouldnt be worth it. There are soooooo many better skis out there for skied out days, but also kill it in deep pow. Also, because they are so fat underfoot, sometimes landings arent as soft as the should be, especially in heavier pow.
If you have a park ski, and a fat all mountain shredder that is very capable on pow days, get the ARG. If this is gonna be the 2nd ski in your quiver, get the JJ. The ARG's just arent worth it unless its deep and not skied out. But if it is deep and untouched, the skis will change your whole perspective on skiing and pow days...really though.