It's the synth line!
These songs by Jan Hammer have a vibe more similar to one slip than Crockett's theme, that one doesn't really have a similar vibe.
Candy: https://www.youtube.com/watch?v=uuvs7hNUplQ
Miami Vice Theme: https://www.youtube.com/watch?v=6nPTZqnIfFM
One slip has a Miami Vice vibe to it, like Jan Hammer's music, here is Crockett's Theme: https://www.youtube.com/watch?v=_UmOY6ek_Y4
These songs by Jan Hammer have a vibe more similar to one slip than Crockett's theme, that one doesn't really have a similar vibe.
Candy: https://www.youtube.com/watch?v=uuvs7hNUplQ
Miami Vice Theme: https://www.youtube.com/watch?v=6nPTZqnIfFM
One slip has a Miami Vice vibe to it, like Jan Hammer's music, here is Crockett's Theme: https://www.youtube.com/watch?v=_UmOY6ek_Y4