I am a kiwi pilot that trained in NZ and came to Canada and converted my license with Great Slave Heli in Villineuve and after the training i got i was really disappointed that i didnt do my whole license in Canada, as these guys really knew their stuff. I hadn't even done a full on auto til i got to canada!!!
The 10 hour " mountain " flying requirement in NZ isnt worth a **** in Canada as you will get proper mountain training when you are needed for the mountains or forestry.
The night flying requirement is also not worth it, as i feel the 10 hour instrument requirement in canada is far more valuable, and not many operators do night ops anyway.
The extra 50 hours you will have on your license i don't think will impress too many employees anyway cos 50 hours doesnt really make much difference.
If you train with a company that is also operational in canada you have a chance of getting hired on with them if you impress them enough.
In NZ you may go to a reputable flying school and still end up getting flight training from a guy with 400 hours total time consisting of frost protection and joy rides!!! a far cry from a guy with 10000 hours that is production long lining and fire fighting during summer and instructing during winter.
Just my thoughts after having gone down that road myself.