Brockalizer
Two Sabatian Shaws' taken from the same timeline only seconds apart are placed inside an indestructible observation tank, about the size of large county jail holding cell, divided down the middle, that has devices capable of turning mutant powers on/off with the flip of a switch. Shaw A and Shaw B both isolation booths on their sides of the observation tank. When the first isolation booth opens up Shaw A is seemingly instantaneously punched by the Flash at maximum speed. When the second isolation booth opens Shaw B is approached by Superman, who then punches Shaw B with his strongest punch. Flash and Superman depart. The barrier separating them has been withdrawn. The switch turning their mutant powers on and off has been switched off. They both are no longer capable of absorbing any more energy. They do however, still have all of the energy that they just absorbed. The two must now face each other toe to toe and brawl until the other one is dead. Which Shaw wins?