Dreams and Coffee & Cigarettes

watch Kurosawa's Dreams, as well as Jim Jarmusch's Coffee and Cigarettes. These films are both vignette-styled films; that is, films with short contained narrative fragments in which the entire film is centered around a theme. How does each film construct its theme? To what end? How are they different? https://www.youtube.com/watch?v=lBgJ7OrybVk&t=262s