Amazon is mislabling the iPhone. There is no such thing as an international version.
The international version shown there is likely just a model for a country that is not UAE or other middle eastern country
Since some Middle Eastern countries ban certain iPhone features such as Facetime, the international version may just be referring to a model from a different country which would have Facetime or other banned features available on it for example.
Also that international version will likely not have a valid Warranty in the middle eastern country you may want to use it in.