Much better in fact! This is because with active braking on the beginnings of a collapse, it is not a case of pushing air from the rear to the front, but of altering the profile by pulling down the trailing edge in such a way that no lift – but in this case it is in fact downforce – can build up on the underneath in negative flow.
On braking, an air cushion is created between the leading edge and the trailing edge, which straightens the curvature on the underside of the profile and thus prevents downforce being created.
With RAST, much less control travel is needed to straighten the curvature in the bottom surface. What’s more, with impulsive braking, the profile alters in such a way that lift is still created despite a negative angle of attack on the top surface.