I've been listening to discussions like this for a long time, and honestly I don't understand why....
Don't get me wrong, I'm not snob...I just think of music in another way...or maybe I like most kind of music, so I can't even see some differences among the genres. And most of all, I don't get the idea of better/worst in music.
I just care of people saying something (to me) while playing, no matters how.
Maybe with jazz it's easier to express yourself...but then you hear lot of players sounding exactly the same...
Metal it's more "structured", so it could be more difficult to show some personality...but then you got some drummers you can recognize with two strokes...
I stop here, I could get really boring...
PS: My personal battle...
the MAIN (or I'd say UNIQUE) difference between jazz and other genres is the sound of the recording.
ok, for metal and rock you may need some "boost"...but if you listen to jazz, you feel what they're actually playing.
if you listen to some rock (and metal especially), you hear a heavy edited music. So most of the time all the drummers sound exactly the same. and I HATE that. I can't stand it, and maybe that's the reason why I don't listen to much metal anymore...
I wanna get feelings from musician, and processing and editing the music you jest eliminate them...