In all fairness, I did say it had been a long time since I installed tires and I spoke in past tense, meaning at the time I was installing. I don’t ever recall seeing a Yokohama tire come through the shop and Sam’s did the highest volume of tire installation in the city.
Now... I have no problem admitting when I’m wrong, and I may very well be, but you’re gonna have to provide facts that are less subjective than you’ve presented here. Using the UTOG rating as the sole basis for a determination doesn’t satisfy the burden of proof. It’s not an apples to apples comparison. UTOG ratings represent the standards for how each of the three components are measured. A tire with a higher rating isn’t guaranteed to last longer or wear more efficiently. If tread wear was the only component of the rating, then you could make the case that it will last longer.
It’s entirely possible that a tire could perform well for temperature and traction, and poorly for tread wear, and still achieve a higher overall rating. The manufacturers score their own tires and are not required to base those scores on their test results. They are not supposed to inflate the numbers and they are expected to provide documentation justifying their scores. Tread wear is not a representation of how long a tire will last or how many miles it will travel. There are several factors and they’re mostly related to driving conditions and operating environment instead of the actual tire. This causes significant variances between tires in the same series.
They had good intentions when they developed the UTOG rating system, but it never became an accurate representation of overall tire performance. At best, it’s a general indicator of overall tire quality. You could put the same tire on two matching vehicles and end up with two totally different outcomes. If one driver is aggressive and the other is a Sunday driver, or if one car is used in a harsh environment and the other has optimal conditions, you can expect one tire to last much longer than the other.
Having said all that, I could still be wrong.