I've run KO2's on my Jeep and Montero because they are awesome off road tires, but on my dual purpose LR3 I ran Coopers. Much better on road performance, superb handling and safety in the ran, and decent trail handling. If the LR3 we mostly see road use, think about wet weather handling.
Are you talking about the KO "2" and not the previous version?
What vehicle is the tire on now? What model Jeep and what year Montero? I ask because what do those weigh? I'll bet you it's a lot less than the LR3....
To add on that line of thinking, what width tires are you using?
A 285/60x18 is going have a significantly lower ground pressure than a 265/65x18. Add to that a lighter vehicle weight, and there's actually a pretty big difference in how the same model of tire will behave in the same rain conditions.
It's possible that my lr3 weighing no less than 7000 lbs ever, with a 275/65x18, does just fine because of the ground pressure ratio.
So, even though big wide A S S tires look awesome, they are an inferior choice for anything other than sand but even then, taller and a bit narrower usually works better when deflated far enough due to the frontal issues of a wide tire.
This is why I'm getting ready to change my brakes to allow a 17" wheel and the BFG KM2 255/80x17.... Same principals apply even more to snow tire sizing.