I don't think that is the difference. I'm pretty anal retentive about inflation pressures, rotations and alignment. Maybe its just the crappy Texas roads. I have tried both Michelin and Goodyear with similar results.
My only complaint about Michelin is that when I have needed warranty consideration for a defective tire, they absolutely do not honor the warranty, which effectively increases the cost even more over the premium they already charge for their tires. Cost of ownership wise, I think practically any other comparable tire ends up being cheaper.