https://www.nhh.no/en/research-centres/food/food-news/2017/s...
> Coca-Cola, whose drink in Slovenian stores was found by researchers there to contain more sugar and more syrup than that sold in Austria, responded by saying it adapted its recipe to local tastes.
In other words, Slovenia gets a better deal on Coca Cola but a worse deal on strawberry yogurt. Without more direct counter examples, that only seems to validate the claims made by manufacturers.
While there is plenty of proof that some companies are selling inferior products of their name-brand product in poorer countries, that doesn't mean a difference in taste automatically means it's part of some big conspiracy. Local preferences do actually differ and companies that don't account for that only stand to lose customers.