Hey Mark,
Great breakdown of the data!
I'm not sure the songs are playing exactly the same and especially with XP titles (the differences can be subtle with many performances). I hope others will be able to compare song to song (ESEQ & subsequent midi files). I traded in the DKC-850 with the C5 Pro so I have no way to compare by ear.
Pianosoft Plus Audio CDs ripped to .wav or MP3 won't play properly on the Enspire because of the new file/song format. You hear the midi info with the audio output. I understand the desire to have full stereo yet the conversion of these great albums is tedious at best for Yamaha and certainly the owners of these amazing pianos. More on this later.
I have to say the new Premium Disklavier Radio stations for the Enspire are pretty awesome! Listing to the Rock and Soul station now :-)
Sent you a more detailed email directly.
Thanks!