I would imagine mud tyres are good in the new stuff but I expect it gets slippy when compacted. Hopefully my winter tyres will be ok. I've not had the chance to compare grip in snow. I expect the winters will be good on ice but I'm not sure that snow wouldn't be better dealt with on muds such as my Cooper Discoverer STTs.
Drove back from Bruges in Lynn's Space Star and made it up the ramp from the channel tunnel platform through about 6" of virgin snow with no bother at all then just followed trucks until I got home. Road tyres and no dramas.
As far as tyres go, I'm of the opinion that there's no such thing as snow, meaning no single thing.
Snow, as a material, comes in all shapes, sizes and characteristics as well as the further variables of depth and temperature.
Today, the snow had fallen at about -4C overnight, and it was medium sized flakes, making it cohesive, soft and light and it compacted without going too solid. This meant that my KM2s were ideal, whether in virgin or compacted snow. The weight of the truck helps compared with a car on the same type of tyre.
Last week the snow had fallen at about -18C and it was dry, very small flakes and behaved more like dry flour than any other substance. The KM2s dealt with it OK, but where there was ice underneath (and at -18C that was highly likely) the KM2s just skated. They have almost no grip at all on sheet ice. If the ice has a texture, frosted or if there's some sand on it, then they're OK.
I still haven't managed to get any KO2s (all terrains) but I'm getting a bit closer with the enquiries I'm making, it looks like they may be coming from Holland.
They will behave much like the GGs I had before, and they were quite good on ice, but of course not so good as the KM2s in the deeper soft stuff.
There's no one tyre that fits all, so the secret is to keep plenty of braking distance in front, easy on the pedals and take your time.
A BMW X5 came past me this morning when the traffic was fairly congested and everyone was taking it easy. Snow was streaming of its roof and he was pushing about 80 kph in the outside lane (this is in the city). I just thought "good luck to ya" as he went by. 10 minutes later, he was parked up on the side of the road with another parked car in front of him. as I went past, his front end was stoved-in and the the other car its rear end was the same. What a clown.
No excuse for that at all, pure stupidity.
Have fun guys, but take it easy (if you're lucky enough to get a blanket).