The difference between them is that the aunt was Aomi no iratsume and the niece was Oshinumi no iratsume, Oshinumibe no himemiko and both of them were given another name (the one with 'Aomi' was the aunt [Imperial princess] and the one with 'Oshinumi' was the niece [princess]), according to the theory of Teiji KADOWAKI.
両説のちがいは、門脇禎二の説では叔母の方は青海郎女、姪の方は忍海郎女・忍海部女王であり、ともに同じ「飯豊」という別名を与えられている（「青海」がつく方が叔母（皇女）で、「忍海」がつく方が姪（王女））。