Snowy roads means so many different things to different countries. Uk, snowy road can be 1/2"-2" and a bit icey, schools get closed, trains cancelled and the news channels have a melt down whilst the rest of us carry on as normal. Areas of higher ground, particularly Scotland do have some deeper snow and compacted ice that is difficult to travel on for normal vehicles with summer tyres, winter or all season tyres are not compulsory in the UK.High center locking is best on snowy roads.
Elsewhere around the world you have proper deep lying snow, compulsory winter tyres and a working system to deal with this.
Then there is offroad driving in deep snow, again, not in UK, where the lying snow is quite significant.
As I am new to a proper 4x4 where a computer doesn't do the work for you I have asked the question of what is the best option for winter driving and get many different answers because we all have different ideas of what winter driving is. Even watching the above video is not helpful because it is comparing rear wheel drive to all wheel drive.
Best video i saw was for 2 Skoda Yeti's. 1 was front wheel drive on winter tyres, the other was all wheel drive on summer tyres. The ability to get up a hill and the braking was far superior with the front wheel drive on winter tyres. The test was also conducted on your normal UK style winter road for the braking, hill climb was indoor ski slope.
So, are tyres more important or what we select on the drive train. Does the computer ABS/ESC system perform better than high diff lock.
I have no idea on any of this and would be interested on everyone's input, but state what kind of road and snow you are talking about