Yep it's definitely NZ firmware, as @sidders80 mentioned it has been used before. The Updato site lists it as NZ also.
Defaults to English NZ on first boot, the Samsung Internet default shortcuts are all NZ ones. Herald, Stuff, Trade Me etc.
No sign of any carrier stuff either. I'm quite happy with this, along with the same version for XSA it is the newest firmware available for the S8. Looks like it has the correct fast dormancy settings for Spark which XSA seems to lack.