From what I can tell from the "Harmonized System" Wikipedia article [1], HS is used to classify products, meaning describing/grouping one or more products by so

From what I can tell from the "Harmonized System" Wikipedia article [1], HS is used to classify products, meaning describing/grouping one or more products by some inherent trait. GTIN/EAN instead are 1:1 for each product, meaning that: Take two products A and B ( A != B ) from the same product group (following the example from [1]) 1006.30; those still (should) have different GTINs/EANs. [1]: https://en.wikipedia.org/wiki/Harmonized_System https://en.wikipedia.org/wiki/Harmonized_System