The Coker looks like a Blockley but the rubber compound is far superior. It's tougher and has excellent wear characteristics. I have far exceeded what the Blockleys were capable of and the tires still have a very good tread left after 8,000 miles!
This is my fifth set of fronts. I drive this thing hard, I freely admit, while the roads around this part of the world are doing their best to destroy tires and allignment.