When we tell our ZYN customers that they are in fact the same grape, at times they look at us strange. They say they don't taste any similarity, and nor should they. The grape variety originated in Croatia and migrated to Italy in the 18th century, only arriving to North America in the 19th century. Overtime the grape variety underwent slight character changes in the different countries, resulting in flavour differences due to how the grape matures in different climates and how the wine is made.
The Italians are likely to pick the grapes earlier so there is lower alcohol and lower acidity making a more structured wine.