I had Michelins all the way around when I bought my coach and when I had to replace the fronts because of cracking and 40K miles, I put Michelins back on it. When I replaced the rears I had them put Toyos on. I actually could tell the difference as the rear seemed not not sway as much. I have since removed the fronts, replaced them with Toyos and have found that they seem to track better. I also sold the two used tires for $200 @.
My boss at the school district where I drive bus is only using Toyos and Hankooks. The buses come with GY and those come off before the bus goes on the road.