How is the physical geography of new Zealand different from that of Australia or how is it smart similar?

New Zealand's physical geography is characterized by its mountainous terrain, with the Southern Alps running through the South Island, and a more varied landscape that includes fjords, lakes, and volcanic activity, particularly in the North Island. In contrast, Australia features vast arid regions, extensive deserts, and a predominantly flat topography with notable features like the Great Dividing Range. Both countries are situated in the Pacific region and experience diverse climates, but New Zealand's geography is more influenced by its tectonic activity and oceanic surroundings, leading to a unique ecosystem. Additionally, both share Coastlines that are rich in marine biodiversity, reflecting their proximity to the ocean.