Wasn't intending to, but have decided to remove the 35s BFG KO2 for the winter and installing 20 inch Ford chrome rims with slightly worn (14K km) Blizzacks. Wheel gap is pretty big though. [emoji14] Should be able to stick it out till next March. No blizzacks in a 275/65/20 to be had within 100 km plus hard to ditch perfectly good used ones.
Are the Blizzak better than KO in winter?
In my experience, yes. The KO's are great in deep snow - but that's about it. They turn into hockey pucks when its cold, and have minimal siping to wick away water on ice. The result is that when you're driving around on hardpack, or slippery surfaces, you essentially have zero traction. I'm not sure how BFGoodrich managed to get the three peak mountain snowflake on them, but I imagine they pointed to their deep snow performance, and perhaps some money changed hands with the governing body.
Blizzaks, or essentially any other winter tire with a special compound, are far superior in most wintry conditions. The KO2's will be better on those days when a foot of snow has fallen, though.