I can't really comment on the ON3Ps as I've never skied them, but everyone on NS seems to jizz over them like they're the best thing since sliced bread. So they must be good. From what I've read the Kartels are stiffer and better at higher speeds and charging through tough stuff. People also say their durability is better. If I had known about them before I bought the ARVs, and had the cash, I probably woulda bought them.
I have the ARV 106's (mounted at recommended) and they're still a solid ski. People say they're more flexible and playful than the Kartels. I've taken them in everything so far except >12" of snow (groomers, packed powder, BAD east coast ice, powder, moguls, and tight trees). They hold up well for what I've skied so far. They're decent at higher speeds and have a little tip flap, but that's kinda expected with the rocker tip profile. They feel great in the air and landing. The edges are quite thin which is annoying in terms of durability and future edge life. They are quite durable from what I've found.  I hit a stick with the tip of my ski that was poking out of the ground vertically in glades and it stopped me dead in my tracks. I flipped forward and ate it. Surprisingly, there wasn't a mark on my ski. I will say that the top sheets are soft and scrape super easy because I have so many nice scrapes without much of a reason to. Also for whatever reason the edges rust SUPER easy. Must faster than any of my other skis and I store them the same. Usually only see minor rust after summer storage, but these skis are like non stop if you don't immediately dry them when getting home. Within