I think make and construction/engineering has a lot to do with it.
Bridgestones, for example, are said to be made of a firmer rubber compound and generally have stiffer, less flexible,
sidewalls, and more durable tread surfaces than comparable Michelins.
Michelins are said to be made with a softer rubber compound, and wear quicker, but grab better as they flex more
in difficult handling situations. But they wear quicker overall, too.
(based on the arguments for and against them both in F1 racing, over the last 2 decades)
That said, I went for a "hardier" type of Michelin, thinking I might get the best of both worlds.
The AT/2 is almost an off road tire by specs in the LT 245 75R16 Load range E size. The tread depth was slightly
deeper than the same sized LTX MS2s, so I went for the extra durability and tread depth. There's no noticeable road
noise difference that I can hear, but my hearing is about as good as my vision on some days.
So far, they're wearing as expected with a lot of kilometers on them. Great on dry surfaces, or in mud or snow.
2 years ago, $800 at Discount Tire installed, balanced, out the door price. And, there was a manufacturer's mail in
rebate of $75 on at the time, if you bought 4. About a month later, they got even less expensive.