Well you kinda do both. The first part of the HEAL192 paper is epidemiology, where you learn about study designs and so on. The second part is more about the major issues in public/population health like diabetes etc. The pop health paper at Auckland has a larger focus on public/population health than the HEAL192 paper at otago.
For papers like HUBS which is pure rote learning I think I could've recited about upwards of 90% word for word just before sitting the final. The approach worked really well for me in terms of results, but I dunno how applicable or practical it is for others. It's the only advice I can give cause that's what I did and it worked out good lol. Saves you time having to think about how to phrase something in an exam where the only thing you have to do is essentially identify what to regurgitate then regurgitate it onto the paper.