I've been to both UNSW and UWS.
To say the least, UNSW has better organisation in its coursework and has a nice campus. However some of the buildings are old af along with shit facilities. They renovate the wrong things and use money for things that don't need to be updated. The library computers are old af and it's shit.
At UWS facilities are much better, everything is newly constructed and polished. The campuses are full of nature, but not that great in terms of many buildings. Social life is dead. The library computers are amazing, they are new and look really nice.
In terms of lecturers, both uni have great teaching staff.