styles are midi files fellas ....or did you forget that? 
  Donny, when you play over "tracks" (SMF or MP3), and you 
stop playing, the tracks continue on regardless if you walk away, dance, hop up and down, have a drink of soda...the chord changes all happen, the fills happen, the whole thing 
really doesn't need you at all.
  With a style, if you stop playing....the song basically does too, 
unless it was written over one chord.  A style is 4/8/16 bars of a band/orchestra 
playing single chord...a SMF 
includes all the chord changes.
  The style involves the player more, 
in my opinion.
  I've seen people "play" over SMF...the instrument 
would not miss them if they stopped playing...it would keep going, making the chord changes without them having to do anything.
  I like to 
arrange the music and 
conduct, or lead the band...
not have the band lead me, which it does with a SMF.
    If I thought SMF were more interactive and/or involving than styles, I would have been using them long ago, but, I find them boring and non-involving.
     There will be those who like using them, and, some who
 have to use them, and I wouldn't laugh at them if they did, but 
SMF have no place in my perfomances.      Ian