Hi, like Orac stated big difference but probably still less than Audi want for what is laughingly referred to as O.E. I can't really understand why all these disc manufacturers present their product to MIRA at no small expense for testing if the tests are flawed, the rules are they have to meet or exceed the specifications of the originally fitted units, there is no grey area, they either meet or exceed or no pass is applied, according to the other theory if the short journey with frequent stopping is applied it wouldn't matter what you bought they would wear the same which rather negates the extra value in buying Audi discs, but as this is a delusion because all the discs are tested the same way and I am sure they won't have forgotten to factor in the town driving scenario.
Steve.