Which different Ms are you talking about? The gas dynamics and stellar dynamics results? Those are different observations, not predictions.
But let me ask again:
Well you didn’t know if I did or didn’t argue with them. Even if I didn’t, it will be because prediction/postdiction distinction is not important for the crux of the paper, the observation of the image of a black hole.
Not the entire series of papers; I said Papers V and VI.