For video or stills the
M2P is much better than the MP, with a larger sensor and better dynamic range.
For video there have been many arguments regarding the
M2P vs. the
P4P, and to some extent it boils down to preference. They have similar sensors but the
M2P will record 10-bit HEVC, while the
P4P will not, so the
M2P wins on dynamic range but requires significant post-processing to realize the advantage. On the other hand the
P4P appears to use full-sensor readout which gives sharper 4k video straight out of the camera. Some people find that more pleasing, especially if they don't want to spend much time post-processing.
I'd recommend looking at real samples from both to make a decision.