The Coca-Cola company uses different formulaes for their products in different countries around the world. This is usually tailored to the what the targeted country likes/desires in their beverages.

Some are sweeter than others, others have different flavour profiles introduced to more closely resemble that country's "native taste profile"

In addition the various materials used to bottle and store the product can affect its taste as can the temperature where it is stored and the age of the product itself.