I was out with a Brit girl I know and she got all excited when she spotted a chocolate bar at convenience stand in a mall, she had to have one right away. When she tasted the chocolate bar she told me it was not the same as the ones in the UK, even though it went by the same name and was made by Cadbury. So not all products are the same even if it goes by the same name.
I was told on a Hershey tour once that chocolate tastes are tailored for the country sold. Hershey sells sweeter chocolate in Canada than in the US, for example.
Found this in a NY Times article:
“I imagine it’s down to the final processing and the blending,” he said. After consulting with chocolate manufacturers in each country, Cadbury tries to replicate the taste people grew up with, he said. In the United States, that means a bar that is more akin to a Hershey bar, which to many British palates tastes sour.
Kirk Seville, a spokesman for the Hershey Company, declined to explain the manufacturing process, saying the company preferred not to take part in a discussion about the manufacturing differences between a British and an American Cadbury bar.
For people here with a taste for British candy, no explanation is necessary. Their opinions are already formed.
“Hershey’s tastes like ear wax,” said Kevin Ellis, an Alaskan-born designer with Adobe Systems in San Francisco. Mr. Ellis, who says Canadian and British chocolate bars are comparable, anticipates with delight the boxes of imported chocolate bars his wife's family sends.