Mace takes sabers, tbh. Satele astonishing Eldon Ax, dueling Baras and Mekhis to a standstill, and contending with Malgus aren't feats in the same library as Mace, let alone the same page, and she doesn't have any accolades placing her in a similar league either. Malgus isn't in Mace's class with a blade as well.
For Force, Mace is still more powerful than either, but he might lose this one.
All-out, I'm backing Mace. I'm just not really sure what Satele can contribute as a victory condition here. Even if she sits back and uses Battle Meditation to aid Malgus, I'm supporting the duelist that's an entire tier above Malgus.