I dunno I think there is differences in the Aussie accent with a bit of difference. PPK had trouble understanding me and the poor little exchange student I had a year r so ago really battled but understood my daughter perfectly pretty much.
The differences between Kiwis and Aussies is more notable than say rural and urban Australian accents.
The big one is the "uh" instead of "i" but there is also more of a twang than a drawl, if that makes sense. It is not that pronounced in most New Zealanders. For the most part it is just worth listening to if they say "sex" or "sucks" instead of "six" or whether they want to have some "fush and chups" instead of "fish and chips"