This is subjective part of his test only, everything else is seconds and meters/ feet, noise Lvl in dB, etc
His test of sumer / all season / winter tires in temp below 7c was done in controlled environment.
By far the most comprehensive test, that we ( general public) have access to
Again, problem is aging. Test of new tires is just that, test of new tires. What happens after first winter and tires spending summer in not so controlled storage? Top brands are the ones that are always best bet bcs. that reason.
I had once Hankook,it was by far the worst winter tire I had. True, I didn’t try Kumho, GT Radial and similar brands, so possibly there are worse.
The thing is that tire is the only thing that keeps you on the road. You could have brskes from Porsche GT3, but if tires are mediocre, brakes are too. You could have suspension like BMW M3 CSL but, if tires are mediocre, so is suspension.
For example I just got Bridgestone Blizzak WS90. $164 per tire - $150 discount from Costco, total with installation some $634. Hankook was $97 in Discount tire. After installation etc. price is but above $500. For $120 or something, not worth testing on my own.
WS90 wasn’t my first choice. I was aiming at Michelin, but they didn’t have X-ICE in size I needed, and VC7 was not worth additional $200+ over WS90.
So, I went with WS90 bcs. it is reputable tire and brand (I do have them on wife’s car so I knew what I am getting sort of)
Now, all this being said, any new winter tire is better than no winter tire.