The 'uncommon books', those that differ between EE and NE, show differences which to mind suggest that NE is the more sophisticated and later work. EE and NE are similarsimilar because they represent, if I am right, different stages of development in Aristotle's thinking about ethics but without any drastic or decisive rupture. ThereBut they are only similar and not identical because though there is much continuity but there are also divergences. I mention two points.