I 've run the KO2s on many trucks and Jeeps and they've been great tires. My only complaint is they are prone to hydroplane when you hit puddles on the interstate, because the tread pattern doesn't evacuate water as quickly as a tire with larger gaps in the tread pattern. I floated in our F-350 crew cab twice while running 35x12.50 16.5s,; That's a MUCH heavier truck with a 1,000 pound tool box in the back, so it's less prone to hydroplane.
I've only run one set of Duratracs, and that was on a Toyota Tundra we had for two years. We ran the Duratracs studded in the winter, and they were fantastic. Much les prone to hydroplane, and much better in deeper snow and/or mud than the KO2s. I just ordered a set of the Duratracs for the Raptor. They're getting studded too, so that's what I'll run in the winter. The KO2s go back on in the summer.
** I installed an EZlift kit on the Raptor so I could run the 37" studded Grabbers that had been on the Wrangler (because we were using the raptor much more in the snow). After all the hassle of swapping wheels we discovered the 37s rubbed badly and were a BIG mistake for other reasons. It was a stupid and expensive error to mount 37s -- so the Grabbers are going back on the Jeep when the Duratracs arrive.