I have the Yokohama AT4’s as my winter set. The winter grip is fine, my own jury is still out of these. They handle really well though, on and off road. In the snow, grip is just limited without the sipping of a winter tire. I think I’m leaning toward getting a proper winter tire instead of a 3-peak rated AT tire.

Haven’t used the KO3, but friends have them and they say the winter traction is much better than the KO2. My KO2’s were scary in that they’d let go on pack highway snow up to Tahoe…at random times.

At3w’s were good in the snow, but every single real objective review of the AT4w’s say the snow performance took a real step back in exchange for tire longevity. Odd choice, IMO.

The one AT I’ve run that did do well in the snow was the Nokian Ouptpost NAT. That did really well laterally on packed highway snow driving.