It's mostly a no-brainer. Cost of living is higher than AU and wages are lower. Across the Tasman sea the market is 5 times bigger with real earning power around +30%. (but the weather is much more hot and from Brisbane up to the south the fauna tries to eat/sting/kill/bite you).

Housing in Australia is still one of the worst thing about the country, but in NZ is not much better, may be even worse. So New Zealand will become like Switzerland of the Oceania. It's the most beautiful country in the world and the Southern Island is a magical place.

Also, now it's less than 50% white, so it is a very diverse place, especially bigger cities like Auckland and Wellington. So in the bigger cities you can find a lot of good international food and culture too.

I think from a HN prespective if you have an internet business and don't mind the time zone difference and you're earining enough, NZ iz a fantastic place that is safe, clean, first world country, diverse and super beautiful, outdoor lover's paradise.