I have only one friend in Oz, and they seem to be liking it... from the little that I know, I think NZ offers the place with the least difference culturally speaking, even though there ARE differences... I also think that because NZ is smaller, the concentration of SA'ans is bigger, whereas Australia is a huge continent (same size as North America, bTW), and so, although there may be many SA'ans there, one is not as aware of them as in NZ? just my opinion....
Oh, and I was under the impression that it is far easier to get into NZ and THEN try for Oz, if you want to get there eventually, than to go to Oz first... I might be wrong...