Difference between Shorthand Typist and Amanuensis

SHORTHAND TYPIST vs AMANUENSIS: NOUN

A clerk, secretary or stenographer, or scribe.
One employed to take dictation, or copy manuscripts
A person whose employment is to write what another dictates, or to copy what has been written by another.
One who is employed to take dictation or to copy manuscript.
Someone skilled in the transcription of speech (especially dictation)

Trainee, Hairdresser, Jobcentre, Typesetter, Dressmaker, Postmistress, Carer, Secretarial, Governess, Dogsbody, Receptionist, Typist, Telephonist, Amanuensis, Stenographer

Autobiographer, Strachey, Epistolary, Biographer, Hagiographer, Governess, Helpmeet, Dogsbody, Schoolmaster, Helpmate, Copyist, Factotum, Scrivener, Shorthand typist, Stenographer

Radiographer, Trainee, Hairdresser, Jobcentre, Typesetter, Dressmaker, Postmistress, Carer, Secretarial, Governess, Dogsbody, Receptionist, Typist, Telephonist, Amanuensis

Ironist, Maupassant, Max beerbohm, Autobiographer, Strachey, Epistolary, Biographer, Hagiographer, Governess, Helpmeet, Dogsbody, Helpmate, Factotum, Scrivener, Shorthand typist

But at what point does an amanuensis become a coauthor or even the main author of a work?
There he acted as amanuensis to Chancellor George Wythe, who advised him to study law.
Certainly it is far from clear just how much freedoman amanuensis in the ancient world might be permitted.
An author would usually dictate his book to a scribe called an amanuensis.
Jeremiah allowed Baruch to serve as his amanuensis, preserving his prophesies for posterity.
Englishwoman, was written by an amanuensis as she was herself illiterate.
Actually, he employed an amanuensis as the real composer of letters on his behalf.
New Testament book, a mere passive organ, an amanuensis, so to.
Harry Potter Fanfiction by Amanuensis Categorizing my stories confounds me.
Amanuensis Club, expected to become a part of the community.