Wear rate from worst to best. MT 21, T 63, 606. The thing is, for me the 606's aren't worth it since I only get a couple hundred more miles out of a 606 then I do out of the T 63, but the T 63 is $20-$25 cheaper. Performance the MT21 is the best, the 606 and T63 are the same.
Good. Bad. I'm the guy with the gun.
Another day, another foot injury!