"assuming nothing else changes" in this case probably very little.
The issue here simply becomes how many times this set up can do this without fade.
Add to this some "changes" such as pads, hoses, calipers, rotors etc etc and then you'll see a change. This is because the brake torque values have changed. Not so in the first instance. Also keep in mind that under hard conditions like this that the fronts will be doing most of the work unless you make other changes to bias the rear more, being careful to not lock up of course.
