I haven't ridden the JJs before but I have used the Bent Chetlers so here's my thoughts.
The two times I rode the Chetlers was on endless powder days (Two years ago), they were a friends who had recently gotten new Hellbents and had no need for them.
The first 5 runs on both days were amazing! First off they floated great, although previously the biggest ski I had been on was a Line Bacon so this was on a whole new level of width and it performed just as I had thought. I could slash with ease and make long carves when I wanted to, it also allowed me too go to the ridge of some chutes and get a big mountain spine feel in there. The cliffs were wonderful and the Chets held up solidly on them, and allowed me to land switch. The crud was definitely not the skis strongest point but it did hold up.
Later we hit up two features, slackcountry, and trees. My friend had Dukes(I think?) on his Chets so we took a quick hike to hit up some more fresh pow. Needless to say they wrecked the pow but the only thing is they are a bit heavy for touring. At the end we went into the trees, and the Chets are amazing! They had no problem maneuvering when things got tight and they didn't sink into any holes around the trees.
To finish I have to say that the Chetlers could rip anywhere with pow and I would guess only have problems with flapping and stability on groomers and at extremely high speeds. The only ski I can put it up against is the Line Mr. Pollards Opus (Demoed last winter) but if I had to choose a ski that I would use more in powder I would pick the Chets. However if you are looking for a ski that will be used in more variable conditions, and sometimes used touring I would look no further then the Opus.
Hope this helps!
Spark Notes: Chetlers are a great ski, that handles great, but is a bit heavy. Opus would be better for touring and mixed snow.
