When I first bought the HR it had about 120 psi or a little more in each tire. It drove terribly. Wandered all down the road. I had the alignment and suspension checked and they were good. I then had the coach weighed and, using the Goodyear chart I checked the proper inflation for the Goodyear tires. This turned out to be 95 on the front and 90 on the rear tires.
This brought about a MAJOR improvement in the vehicle's drivability.
So, now looking at Mechilin and Hankook I see they would require 100 front and 85-90 rear for the Michelin and 100-105 front and 95-100 rear for the Hankook. Not a big increase but since the drivability improved so much by lowering the pressure on my current tires I'm leery of going back to a higher pressure. Would the design of the tires be such that each one at their scheduled pressure would give me the same ride? Actually I don't think that is a good question since one brand might drive better or worse than another by it's design but I'll ask it anyway.