The blues scale is more minor then pentatonic. heres the pentatonice scale in the key of C C D E G A C BLUES SCALE in key of C C Eb F Gb G Bb C MINOR SCALE key C C D Eb F G Ab Bb C it is easy to see the blues scale is more minor then pentatonic, The blues scale gets most of its notes from the minor scale. The only note that doesn't come from the minor scale is the flat-5. The flat-5, along with the flat-3 and flat-7, are call blue notes. Blue notes are simply notes that are known to have a bluesy sounding quality to them. In short, if you want to sound blusy, you play alot of blue notes. If you play pentatonic scales it will sound like country music or folk the pentatonic scale is what gives folk and country the sound it has.