I wouldn't say it depends on ranking so much as just faculty-by-faculty.
Monash is ranked extremely highly in philosophy for instance, but I've always found the coursework to be significantly more challenging/marked more harshly at the ANU. My friend who is doing his PhD at the ANU in philosophy but who did undergrad at Macquarie also commented that the undergrad coursework looks more intensive.
Another example is in Asia-Pacific Studies - at the ANU, in an undergraduate Chinese History course (2nd year), I had two 1000 word essays, a 500 word essay plan, a 3000 word essay, four detailed factual tests and three ten minute oral presentations for the assessment. This is fairly standard fare for ANU Asia-Pacific Studies subjects, but also, the Asia-Pacific faculty in particular is known for being quite intensive like this, in contrast to a lot of the other Arts faculties which seem to be pretty much the same intensity as other Australian unis generally.