The ‘connection, relation and position of the researcher’ is exactly where autoeth begins, Britta’s definition of reflexivity could be read as one of autoethnography. In reflexive writing, for example, I might write about my personal response to an interviewee, etc. In autoeth I take that response ‘back into the field’ and relate it to the research at hand and the wider culture.
I wouldnt make too much of the differences, however, but look for the applicability of both for the work at hand. As I have said elsewhere, however, I caution being too married to one’s own ‘experiences’ as the only way to honestly investigate any topic.
I often come across (struggling) personal journey PhDers who would be better off engaging in a year or two of good therapy.