Sure, the A/T will be better on packed snow or snow covered roads. It is a winter rated tire after all.
But I've had KM2s on my crew cab f150 and now on my four door Jeep. No complaints with either in snow or ice, and they work better in snow and ice than other mud terrains I've had. I lived in Kentucky for several years and one winter there was an ice storm with 2" of solid ice covering everything, had absolutely no problem getting around in the hills with the f150 and km2s, dragging around downed trees, etc.
I did have the KM2s on the Jeep siped before a wheeling this early this winter and they performed amazingly well off road in deep snow and ice. Out climbed everyone else with all kinds of different tires. No issues on snow packed roads up to the mountain for snow boarding trips either.
I guess it depends how much snow you encounter and your comfort level driving in snow, but I've got no issues or reservations about running the km2s in any winter conditions myself. Some people hate mud tires in snow, period, because they don't compare to a winter rated tire.