Rok, you and Frogman can not communicate because he's speaking Spanish and you're speaking French. "Jazz", as ambiguous as that word is, is 100 times more definitive than "The Blues". Is one speaking of "jazz oriented" blues, or "Delta oriented" blues.
Miles went to Juilliard, and "John Lee" went to the juke joints and the cotton fields. Miles never got any closer to cotton than his Hanes underwear, or was that Michael Jordon; anyway you get my drift. Jazz and blues cultures are as far apart as night and day. A musicians music is intrinsically who he is. Forget about the music, simply go to "google" and compare the bios of jazz and blues musicians to see where I'm coming from. John Lee's nuts and bolts are the juke joints, cotton fields, and all the other cultural morays of African Americans from the Delta.
When you go to "google" and compare bios of musicians, you'll see where they are coming from, and where I'm coming from.
Enjoy the music.