Parmesan and Parmigiano Reggiano are not the same thing, but it depends where you are

Parmigiano Reggiano is a protected designation of origin, registered at European level. That means the name does not describe a style of cheese but one specific product, made in a defined area to a filed specification: raw milk from cows raised in that area, no additives, no preservatives, a minimum of twelve months' ageing.

This is a difference of category, not of quality. «Gruyère-style» is a kind of cheese; Parmigiano Reggiano is a product with an address. Someone making it outside that area, or inside it without following the specification, is not making a worse Parmigiano Reggiano. They are making a different thing, which may well be excellent, but has to be called something else.

In 2008 the Court of Justice of the European Union ruled on case C-132/05, brought by the Commission against Germany. The question was whether «parmesan» could be used on the German market for cheeses that had nothing to do with the Parmigiano Reggiano specification.

The Court held that «parmesan» constitutes an evocation of the protected designation: there is phonetic and visual similarity, and conceptual proximity, both being hard cheeses for grating. Using it for a different product is therefore prohibited within the Union.

The part almost nobody reports is the operative one: the Commission's action against Germany was nonetheless dismissed, because a member state is not obliged to prosecute infringements of its own motion. The protection exists, but it has to be enforced by whoever owns the name. It is one reason consortia keep legal departments.

Outside the Union the story changes completely. In the United States «parmesan» is a generic term and even has a federal standard of identity setting out its minimum requirements: it is a product category, not an origin. A cheese made in Wisconsin can lawfully be called parmesan while having nothing to do with Emilia.

This is why the same question gets opposite answers depending on where you ask it. An American shopper comparing «parmesan» with «Parmigiano Reggiano» is not comparing a fake with an original. They are comparing a domestic category with a protected foreign designation, and in their country both are perfectly legal.

Trade agreements follow the same line. Under CETA, Canada agreed to protect a number of Italian designations, but «parmesan» stayed free. That was the price of the deal.

The rind of a Parmigiano Reggiano carries a pin-dot marking that repeats the name in full all the way round the side, together with the dairy's registration number and the month and year of production. It is not printed on: it is pressed into the wheel while the cheese is still fresh, using a marking band, and it stays legible for the life of the cheese.

On a pre-cut wedge that marking appears along the rind edge. If the rind has been trimmed off, or if the cheese is already grated, the check is no longer available and only the label remains.

The paste of an aged wheel is granular and flakes into shards rather than slicing cleanly, and it carries the white crystals that form over time. Those are useful signs, not proof. The proof is on the rind.

Look at what people actually discuss and the recurring question under this comparison is not technical but economic: «I paid this much for this piece, was that fair?» It is worth setting out where the cost comes from instead of answering with an adjective.

Around sixteen litres of milk go into one kilo of Parmigiano Reggiano. On top of that come at least twelve months of ageing, during which the wheel occupies space, has to be turned and brushed, and loses weight to evaporation. The capital sits still for a year before the product can be sold at all, and for two or three in the long agings.

An industrial hard cheese can be ready in a few months, from pasteurised milk collected anywhere. The price gap does not measure how much better one is than the other: it measures milk, time and idle capital. Whether that is worth paying is the buyer's call.