mahdibassam:

 

and what would be the differences between the global and CN versions? 

 

Software is the chief one. The Chinese version natively runs Hydrogen OS which differs significantly as there are no Google services in mainland China, and has been unofficially modified to run Oxygen OS. While in generations past doing this has resulted in units capable of receiving software updates, this was never official and could break at any time, including Google Play certification. 

The Chinese versions use a slightly different set of components and are not certified to anywhere near the same level as global in terms of SAR/safety/emissions/radio frequencies/software licensing, although they do by and large support the same network bands as at least one global version - in this case the EU version instead of the US version. Thankfully there is no impact on the bands needed for NZ networks regardless of the version you buy, although I believe there are more carrier aggregation combinations supported on the US and EU versions.

In box accessories will differ. Packaging will differ. There is supposed to be a screen protector included with the Chinese version, but as you and others have reported, there may not be.

Whether you or others care about this is up to the individual. Above all, good luck with warranty.