No cherry picking Viv, I just took the first two prestigious races that came to mind.
If you would prefer to focus on the Breeders Crown over the last 10 years,
2YO colts - Aus (8) NZ (2)
2YO fillies - Aus (6) NZ (4)
3YO colts - Aus (4) NZ ( 6)
3YO fillies - (Aus 8) NZ (2)

Total - Aus (26) NZ (14)

It ain't what it used to be Viv. The kiwi dominance is not there anymore. Something must have happened to your grass !!