One important distinction seems to be that the US by-and-large used art deco in institutional & commercial applications, but not much in the way of residential (NY being the exception here - and even then it tended to build more in the Beaux Arts, Italianate, etc. styles, from what it seems). A place like Tel Aviv on the other hand is chock-a-block with streamline moderne stuff like this:
https://goo.gl/maps/nWMwLsQvJWpMtyBp9
As a result I wouldn't be surprised to see some non-US cities with the highest
numbers of art deco buildings, even if the best and most of the grand examples of the style are largely found in New York, Chicago, LA, and Detroit.