x10 on the factory oem ones. My brother is a ford mechanic so we do get a discount on motocraft parts so that helps, but the extra money for the stockers is well worth it. Good luck finding aftermarket ones that last as long as stock.
The stockers are good. I have tried both HAWK LTS's and Motocraft ones. I think they were about the same and no waiting for shipping. I think I had better stopping with the HAWK'S however. I had a set of Powerslot rotors and Hawk LT's last me for about 2+ years before the pads/rotors glazed all over.