If your argument is that the ability to run android apps gives surface an advantage over iPad pro because of access to non-pro tablet apps, this makes no sense

If your argument is that the ability to run android apps gives surface an advantage over iPad pro because of access to non-pro tablet apps, this makes no sense at all. The iPad has a better library of non-pro tablet apps by far. The only question is which device is better for running tablet apps aimed at Pros. I think that is currently open to debate, but Android isn't even a player, so running Android apps is no advantage.