n2o

what makes one n2o system better then the others

its all the same gas right

so what makes zex or nos better then F&F or N&X n20 system

I'd guess it has to do with the system that delivers the laughing gas. Because yes, N2O would all be the same. Also, some automatically release it, while others are manual.

There are different ways of implementing N2O, one being better than another depending on your application. Some tests have seen more power from different kits.