Watch the Study 1: Straight 8ths online guitar lesson by Carl Verheyen from S.W.A.T Improvisation
Although this performance is blues-based, it has an entirely different vibe to it. The A minor Aeolian mode is used here and the natural 6th contained in that mode sounds completely different than its Dorian counterpart in the first performance on this groove. Since our context is not dictated by another chord in the progression, it becomes simply a matter of taste as to which scale you want to hear. The knowledge to choose between these modes gives you options which add depth to your playing.