I don't think you are going to find many folks with actual KO2 usage, definitely not long term since they were only released November. These are a new release and the new sizes are still being released. My 18" tire size won't be released until March this year.
My guess though is if you are unhappy with the KO, you won't be happy with the KO2.
Did some checking and found out the these two rinks which may help you out. They show 5 tires which all should have your size. Toyo was not one of the tires, but tirerack carries them at least in the size you are looking at getting.
Non-Winter Tires That Meet the Industry's Severe Snow Service Standards
