Interesting post for sure. I enjoyed all three tunes. Thank you for posting.
It certainly, for me, underlines the minor differences in sound between all these different keyboards. I wonder what kind of replies would have been forthcoming if the keyboard model was not mentioned and we had to guess what Yamaha instrument was being used for each piece.
I think my old Tyros 4 will 'Cut The Mustard' for a bit longer.
Vic