During my Trucking days, the relatively small firm I worked with did a test on tires by purchasing lots of different brands, many of which I had never heard of before.
After the years of the tests, and millions of miles, the conclusion was that there was virtually no difference, at least in the durability and longevity departments.
Because of those tests, I have saved many thousands of dollars over the years by buying off brands that others just do no even consider, and have some unkindly words for those of us that do.
Right now I have on Double Coin tires, but put on the steering tire (R150's if I remember right) all around, and my coach is 26000 lbs and doing just fine.
And yes, I got them at a major west coast chain.
Just my way!