It's difficult to say, because we know very little about the internal governance of these platforms, and that's an important research and governance problem in and of itself.
It is clear that at the high level of business strategy and corporate leadership, Mark Zuckerberg wants Threads to be relatively anodyne and devoid of political content and controversy—more of a feel-good place—whereas Elon Musk wants X to be a wild and free-spirited environment in which people can get their kicks.