You would at least have the opportunity to a/b the two before you flipped the One10 - you might be pleasantly surprised and flip the Markbass. I am a fan of Markbass amps through the Barefaced 10s but I don't think their speakers come close to the tone or power handling of the BF10.
I'd like to know the results of an A/B test as well, as I know the results of my own A/B test with the One 10 vs. my GK 210.
But as far as power handling...the Markbass cab is rated for almost twice the power handling as the One10.
Also keep in mind that the One10 is rated at 95db sensitivity vs. 101db on the Markbass. So the Markbass is going to be a LOT louder with the same power.
There's only so much you can get from a tiny box with a low powered driver that's designed to break up. The One10 is a nice cab for low power, but it does not defy physics here.