I can only speak of NSW and QLD.
Working as a PGY2/Resident is basically like working as an PGY1/Intern, except you're a little more familiar and competent with doing the job of a junior hospital doctor (clincial reviews, ward rounds, referrals and consults, discharge summaries), but you're still relatively junior so you still get reasonable supervision and support from Registrars +/- Consultants. I think the time you get a bit more autonomy to take on more responsibility is as a PGY3/Senior Resident, as this is a stepping stone towards becoming a Registrar, which is the stage most people enter BPT.
I suspect wherever you practice (throughout the state or country), your experience largely depends on the hospital and specialty you're rotating through. Although I suspect there are some experiences which are very similar; that is, doing medical or surgical ward rounds in any hospital is the same anywhere, just as I would expect working in ICU is standardised across Australia, et cetera. The good thing about Australia is that most standards of care are nationally standardised, with small minor local procedural/policy differences between the hospitals. There will be your variety of toxic asshat personalities and genuinely inspiring people in any workplace.
Best hospitals in Sydney I recommend for BPT is Royal Prince Alfred Hospital, Concord Repatriation General Hospital, and Royal North Shore Hospital. I've worked in all three and have had friends and colleagues also recommend these hospitals. Well supported and good success rates for in-house study programs towards achieving your FRACP. They're also hospitals with robust physician specialty units and specialists with whom I trust to refer my patients to.
