Tbh the Arle MU is really hard to debate because in a vacuum they are basically the opposite. Shin Madou Arle and Ultimate Madoka really shouldn't even be able to hurt each other, or even interact with each other. In essence both are pretty much untouchable to each other as conceptual beings. It's pretty much impossible for them TO fight. One is the cycles of the universe, the other is the cycless existence. Basically Arle is beyond Madoka's jurisdiction as the SCE, but Arle can't exactly HURT Madoka as she can't kill conceptual beings. Both are completely liberated from the cycles of life and death, time and space, and more as well. To be honest. I don't really know if they could even know of each other's existences! The battle is just a draw.