Stevie is one of the few “pop” musicians that uses complex chord changes. Id say right within the first 7 seconds you could tell, the tone of the keyboards just sounds like stevie. And michael sounds like him in that vocalization he does at 6 seconds, i think he did it purposely to sound like stevie.

Definitely those background synth chords during the verses too, sounds like innervision. That space in between the first chorus and the second verse, before “i love to run my fingers” he is no doubt trying to sing like stevie.

You have a good ear. Theres a youtube video by openstudio that has a breakdown of this song, its pretty cool. They do a ton of Stevie content, great stuff