I got some Couloirs in December and have done three tours in them plus a few more days acclimatisation. I cannot compare them side by side with the Stocklis - my usual ski is the Mission. I have found them an excellent touring setup. Light, very quick in bumps and terrain, good edge grip. They are 89 underfoot. However, being so light they can get thrown around a bit in heavy, grabby or crusty conditions. My Missions will crash through anything, and i find myself shortening turns in the Couloirs to hold a tighter more predictable line. Have skied good powder lines in them and are ok at speed but would not want to take them to the limit (yet). In short, I really enjoy touring on them and the weight/performance benefits more than outweight the twitchiness (which is mostly in my head in any event).
I think they are a ski that should get more take up. I have found Stockli to be stiffer. I am light and not a very aggressive skier (72kg) & 5’9”. A heavier or more aggressie skier might want to try the Stocklis. That said, the Dynafit Stoke is an amazing ski and the Manaslus are well worth look as well.