As the others have stated the difference is minimal and either tire manufacturer is quite good. There is that much difference between tire manufacturers, do to tread depths even though the tire sizes are the same and later as the tire wears the circumference changes also(marginally, but still changes about that 2% range).
Just to throw a few more names out there, TOYO and Yokohama make great tires also. I usually buy my tires from Costco, they include install in their prices and free balancing every 10,000km's, up here anyway. However you are limited to the few brands they bring in. Michelin, BFG etc.
