Differences between oral history from oral tradition?

first we need to know what oral tradition is and what oral history means. oral tradition is the basic form of historical consciousness for societies in the period of their development, prior to the establishment of a written culture. it can also mean the preservation of personal and cultural history in the oral communication of stories, songs, poems, ballads and folklore. Oral history on the other hand, is the systematic collection of living people's testimony about themselves. However, there are differences between these two. oral tradition means the transmission of cultural material through vocal utterances, painting of the people, the myths of the origin of the people and such related unwritten conversation on salient issues concerning the people; while oral history is a written work of history based on interviews with or recording of participants.