Either the style was a song style, only usable for that particular song, or it was an SMF or even a MP3 made up for that tune. TBH, I find song styles a terrible compromise, as, while the kicks and stuff can be in the right place, you still lose the voice leading that bass players will put in to go FROM somewhere TO somewhere, and an arranger never knows the next chord until you play it!
Both are great musicians, and Robert has a great sense of re-harmonization, without totally losing Stevie's intent. But I must confess, falls into the same trap so many do, allowing his piano part to dominate the track instead of sit 'inside' it. Seems like this pitfall catches great and small alike!
My guess was that the track was an audio file... Anyone notice that there was only a sustain plugged in on the back of the Audya? There goes the idea of triggering different sections with pedals. And he never makes a call to the fill section. Not to mention that the bassline is something that no arranger could ever play (too much voice leading).
It's karaoke, with a singer and Rhodes as the only live thing.
Nothing intrinsically wrong with that, but it ain't an arranger performance, in case anyone was fooled...
_________________________
An arranger is just a tool. What matters is what you build with it..!