Havent had experience with the KM2 but I think it would come down to what you are doing with your rig. I've had 2 sets of K02 on my 80 series and have had no issues.
I mainly use my rig as a daily driver in eastern canada and have take West to east coast trips, weekend wheeling. KO2 did it all with no issues, plus if you needed to get another tire for some reason while on the road they are fairly easy to come by vs the KO2. Atleast here in canada.
Good tread wear, good road manners, ability to air down fairly low when you need it to, tough as nails and I find them relatively good in the snow for not being a true snow tire.
Hooks up well in light and packed snow, have to take the corners a little easy, just make sure you give it a little gas off idle if you are running a full time AWD in corners. Very manageable when you figure out the tire.
I vote KO2, practical, works and totally confident tire