Goodyear Wrangler Duratrac with studs ....
Also, anyone who thinks running a "mud" tire in the winter is a good idea is a moron, plain and simple.
Duratracs are definitely top of the heap without going to a dedicated snow tire......but like was said above, conditions vary so widely, that dedicated snows don't do well in deeper rutted or untracked snow, like that last 5 miles to get yer sleds unloaded after you leave the highway.
I agree with your mud tire statement 100% UNLESS you sipe them.
Then they become great all around tires like Duratracs or KO2s.
Like you, I've run more brands and styles of tires on personal and work rigs everywhere from AZ to AK and top 3 do it all tires are Duratracs, KO2s and Toyo ATII.
But on my personal rig, my go to have been siped mudders for years now. They just work. They dig when you're in the soft stuff and the siped tread grips well on the icy/slick stuff. Never studded them because now we live in the land of rain. 100miles of wet and 10 miles of snow is a typical drive to the hill.
The other 2 main things that determine how well a tire performs (besides your driving skill and right foot) is tire pressure and weight in the back.
Sooooo many people don't get the concept that having 80psi in your back tires because that's what the sidewalk or door sticker says is WRONG.
Sure, pallet of block in the bed=80 psi. Towing the sled trailer to the hill = like 35-40 psi, or possibly less depending on conditions.
Many days, conditions are bad, I'll hop out and drop rear pressure to 30psi or less depending on load. It's like having a new set of tires!