I know people who like both so I don't have a real bias. What I noted in the video was that the conditions were fairly hard. The traction in that condition is obtained by the flat surface of the tread, but especially from the leading edge. The Firestone R1 tread spacing is probably around 6" apart compared to probably around 8" on the R1W Michelin. In a higher moisture field with less soil tensile strength on the surface, the tread needs to punch into the ground to get the best grip. I'd think the R1W spacing would have more traction then.

It would have been more instructive if Firestone had done a video showing one of their R1W tires against their own R1 tire. I'd like to see that kind of video done in various soil conditions so we can all learn where each type of tire has the advantage.