Sumo,
I think it's hard to get past this statement: "In fact, I still run 10 year old (dedicated Steamboat track) WS50, and find the 'newer' designs of any flavor still don't best the 'original' compound in any significant test." because there's no question the newer designs are better than yours. None. In addition, a tire molded in 1999 would have significant degradation and hardening which would cause a soft winter compound tire to suffer greater traction loss on its specialty - ice - than even a normal tire does after 10 years of aging. So, I think it may be a bit of a stretch and calls your impartiality into question.
Also, I'll have to check, but I heard that TireRack's testing or Consumer Reports testing gave the advantage to the Michelin over the Bridgestone winter tires.
DougM
Doug
Let me explain further... I bought a set of WS50 10 years ago, put them on a set of wheels, and haul them in my back seat to the steamboat track every year. I run *only* the 4 miles to the track, and *at* the track with these tires installed. I then remove them, and take them back home and put them in storage, for the next year. They are still nearly full tread, only recently lost all the molding nubs, still have the ink line within the tread, and have retained their gummy-bear-like grip without issue. I routinely compare them to 'new' tires at my event (objective and subjective tests) and the tread appears as soft and squishy as the ones another bought 2 days prior to my event this past year.
I claim the "new" technology really hasn't given a measurable gain in 'traction' to differentiate it beyond the driver skillset. In fact, the Nokian Rsi has none of the 'new' blizzak tech, and it will perform as well as the Blizzak with the new tech. WRT the Michilen x-Ice, we have a couple sets of those at the track, and they perform well. Better? Again, I just look at skillset. The guys that run the x-ice don't have the skillset to demonstrate any measureable difference over any other 'ice' tire.
My subjective 1300 miles on a set of the x-ice Michelins... IMO, they sound and feel brutal when not on ice. When I do demo drives in others cars, I don't ask which ice tires they have, because they all feel and handle the same. I can not tell any flavor Blizzak from any other or from the Rsi . I can usually feel the sidewall difference of an x-ice as it makes more noise and feels stiffer.
In our advanced skillset group running Steamboat, we have every flavor/generation of Blizzak represented, as well as, the Rsi and the x-ice. IME/O any of these ice tires puts the level of difference at the driver skillset, not the latest tire 'technology'. Several guys try to gain this 'tech' advantage every year, and I'm happy to be the baseline with the WS50's.
Again, I'll invite anyone that wants to understand my perspective, experience and opinion, to join me at the Steamboat Ice Track Jan 30-Feb 2.
HTH
Scott J
94 FZJ80 Supercharged
Eventmaster
Gruppe-q Steamboat Winter Driving Event 2010
USAudiClub