I've been noticing a dramatic difference in the way my bike performs on snow as opposed to ice. I selected a heavy steel frame Electra with wide Nokians for biking on the assumption that it would have a low center of gravity, easy reach of boot to ground, and easy handling. All of these features do make it excellent for ice, and to date I have not slipped on the ice even though it's been on the ground since October.
But the same features that make it great for ice bog it down quickly in the snow. Beyond a few inches of drift or loose doughy snow, I start to slow down greatly. The curved bars and cruiser style make it hard to stand up for more torque, and there are only three gears. For deep snow, a very different style seems called for.
Have you found this to be true, or is there one style that will work well with all winter conditions?