As we all know, when we replace any brand of worn out tire, with any new tire, the new tire will feel better and out handle the worn out one that was just replaced. The only way to get a true comparison, is to have a spare wheel mounted with a new tire, and have a new tire from a different manufactor on your other wheel, and then ride and switch wheels, to do the comparison. This test will not tell you which will last the longest, but will tell you which tire handles the best.