Given the details on your previous thread which you have failed to include here, I think the Margaret Young on “Commodore Perry” 1856 is more likely to be the correct one.
“Commodore Perry” arrived NSW 1st May 1856
Margaret Young age 20
Housemaid from Dundee
Parents Archibald and Janet
church of Scotland, could read & write
good health
Sister Jane Brown living in Clarence St---------------
Possible birth (see SP)
Margaret Brown YOUNG baptised 15/3/1835 Dundee
Parents Archibald Young and Janet Brown
1851 census
https://www.freecen.org.uk/search_records/5b1a8e7bf4040b2ba34a8ad3/margt-young-1851-angus-forfarshire-dundee-1835-?locale=en_____________________
“Telegraph” arrived 1858
Margaret Young 22, with Ellen Young 19
General servants from Northumberland
Church of England, could read & write
Parents George and Thomasine
Sister Ann Young living with Mr. Christopher R..shaw?