Newcastle is not all that different to most of the eastern suburbs. The harbourside parts like woollahra, and rose bay etc are unlike Newcastle.
The rest, randwick through to the beaches and south are very much like bar beach and cooks hill in Newcastle. A mix of public housing and bogans among middle classes.
Both newy and the eastern suburbs share a large population of young men with “sleeve” tattoos, gelled hair, “Elwood” t shirts, “von Dutch” caps, shoulder chips, drugs, and a lack of respect for women, education, the arts and the finer things in life.