Of course they are. (Coca cola tastes different in every country, and it is basically, sweetened water with no trace of coca)
The natural extract is the secret and always imported from the US, but the variations are in the water and also the sugar syrup used, it depends the location in the world (source: I visited a factory once)
You can go to World of Coca Cola in Atlanta and try them all. I'm told the Beverly is especially memorable.
Probably just doing that so they can maintain their exclusive right to import it legally.
It's not the only company doing that. In Italy you get a amazing liquor named 'Coca Buton' that imports and processes cocoa leafs to Italy.
As far as I know the only European company that is allowed to do that. And I swear that drink does still contain some alkaloid magic, even thought there obviously is no cocaine in it.