I hear they are comparable and I did some checking before I bought. There are a couple of videos out there of the prototypes that weren't favorable, but the ironic part of the video is they were originally generated by Yukon to show the testing they were doing in the early stages of development.
I talked with the Yukon guys at EJS last year and they claim they are at least as strong as ARBs. By the time I bought it I was confident it would work for me, and I'm not easy on my equipment. I wouldn't run them with 40" tires, but then again, I wouldn't run 40" tires on a Dana 44 either.