> Furthermore, in common law countries like Australia, you have many legal concepts that have developed independently of statute and either remain independent or have been formalised into statute.

This is the bigger point. In my own university studies, there was a clear segmentation between the common law and statute, although they are certainly interrelated.

It’s also worth noting that the boundaries between cases and legislation were not absolute, there were areas of the cases ‘mainland’ that contained legislation.

My point on the style was that in addition to differences in purposes, they are also textually different, which can indeed bleed into semantics.