I have made no distinction in what has been said between Speaking and Writing, because tho they are talenL'i which do not always meet, yet >"'1•""�� there is no material difference between 'cm.
I think Ong would take issue with the notion that there is no "material difference" between speaking and writing. Writing is a "technology" so to speak, and thus presents itself differently than mere thought through speaking. One can go back and edit writing, whereas orality is not so easily done.