One oddity I have noticed at
https://www.apple.com/uk/watch/cellular is that, although "there are two separate models for Apple Watch Series 4", "They have been optimised for use in the country of purchase". How can a given model sold across multiple countries be optimised for each country?
Lack of optimisation is one thing but lack of functionality is more serious. Model A2007 (40mm) and Model A2008 (44mm) are sold in both China and Hong Kong, yet there is a note against the latter country stating, "This product has been optimised for use in Hong Kong and will not work in mainland China." How can this be the case if they have the same model number?