Fast food chains depend on flavoring agents to keep consistent taste around the world , with the import impositions of the government in Argentina it is from difficult to impossible for these chains to get a real supply .hence it would be very rare to get the same taste in a KFC here than in the US same for all the other ones , chickens do not eat the same here as they eat in other countries therefore they will not taste the same . Fast food chains depend on these additives to keep the taste constant .
So dont get much hopes for any of this chains to taste the same as what you remember