New Zealand is greener and less flat than Australia, with big, sometimes snow-capped mountains on the south island. Since it's further from the equator, it's generally colder and less dry than Australia, and it gets colder the further south you go. Other ways to differentiate the two are the presence of Maori language in New Zealand, with works having more harsh 'k' sounds than Aboriginal words in Australia, and the slightly different bollards in New Zealand.
