As Mario clarified for us, all midi will have some element of Velocity. I think this can, at minimum, represent tuning the note on and off and the resultant volume. The MST velocity is all over the place indicating a touch sensitive keyboard in the hands of a pianist who plays with soft and aggressive feeling. Also the MST (or SMT, whatever), records the player using the piano pedals to sustain and release. That is essentially the only meta data I see with the exception of some on and off elements.

The RT shows only velocity. I can't tell if it is programmed or played but I have a suspicion of the former. Again no other meta data on the track.

What does it all mean? Well it may explain why I long ago decided on only MSTs for my selections from BIAB when I need good midi piano. I suspect you may need to gather you own conclusions by listening.