Of this group the BFG KO2 gets my vote every single time. Best looks of the bunch, classic unmistakable design that aggressive yet docile at the same time, undisputed tread life winner, available in the most sizes, easy to find and kick a$$ sand performance. Now if you threw the Toyo R/T and Nitto Ridge Grappler into the bunch I'd have a hard time picking a winner amongst them and the KO2.
I've said similar things on many threads regarding the KO2s. The KO2 are a great off-road tire, and the tread life is insane. We sold ours with 30k miles and they looked new. And with the recent large increase in the pricing of the Falkens, the price is about the same as KO2s (my current Falkens were $140 a piece in 2016, they are now $240!).
If I didn't live and drive in a icy snow region, the KO2s would be an excellent option based strength and treadlife. There was also a post on here that Falken changed their rubber formula which may not be as good in winter. Not sure if that is true or not, I've driven my FJ62 a lot this winter on new Falkens and they have done great, but the winter in the PNW has been rather mild so far.
That undisputed tread life of the KO2 comes with a trade off. Tires that use a softer rubber compound provide better grip on snowy surfaces as the rubber does not harden as much in cold weather. This is where Goodyear did an amazing job with the Duratracs, and why plow drivers have relied on Duractracs for years, but it is also why they need lots of rotations or they get loud (softer tread is finicky, needs more rotations as the softer tread is more prone to wear from misalignment or lack of rotation).
Falken uses a similar rubber as the Duratracs, with a silicate that improves tread life and traction (at least in p-rated) while providing the benefits of a softer tread. Falken also puts deeper treads than most manufacturers to ensure similar life with their softer rubber. Still, at 40k+ miles on my set, you can see they have worn (acceptably imo) but my KO2s wore much slower. I'll take a measurement of my tread when I hunt down my depth gauge. I've also taken them off-road, and they have performed excellent.
The rubber in the KO2 by contrast, tends to harden more during cold weather and as a result, slide much more easily on slick surfaces like ice.
Snow traction is best with snow on snow contact, where siping and deep tread helps. The KO2 and Falken are both very good for this (for ATs). The Blizzaks and Hakkas, by contrast, have a lot more snow catching grooves to improve on road snow performance.
Dedicated winters like the Blizzak DM-VZ take this even further, with a super soft moisture absorbing tread (first 50% of its tread, which is the good tread, will be gone in 1 to 2 winters). But the winter performance is amazing.