Hello,
Yes you did. The difference between making wine at home and and making wine on a commercial basis.
You mean besides the licensing requirements.
That is the biggest difference between the two. And they vary from state to state. In my home state of Ohio, when I contacted the governmental agency that handles that, I was told it would take a minimum of 200,000 - 250,000 to get started as a commercial winemaker (I think even more for distilling). And that was several years ago. That is all the required licenses and required equipment. There are requirements for building, equipment, etc. And don’t forget all the added taxation. I think Ohio is one of the worst states for taxation of wine.
As a home winemaker in Ohio, I can make up to 250 gallons per year (I think, I’d have to check the statute to be certain). That 250 gallons includes all wines - grape, apple, etc. As a home winemaker, I cannot sell or gain profit by the wine in anyway - but I am allowed to give it as a gift to friends and family.
A commercial winemaker can use either fresh grapes or juice. I believe that fresh grapes are more popular, but juice is certainly used. In fact, I visited a winery in North Carolina that used juice exclusively. Of course the use of juice necessitates the use of sulfites (the juice maker will add them to the juice) and balancers - especially energizers and nutrients.
As for the actual production - the biggest difference between commerical and home winemaking is the same as in almost any endeavor. A home winemaker can give more care than a commerical winery. A commercial winery must be concerned with raw output - as much quantity as possible. As a result, many shortcuts are taken. For instance, the extensive use of sulfites; the use of whole laboratories to detect and correct any balance deficiencies; the overlooking of potentially bad fruit (which even more necessitates the usage of sulfites); etc.
Now some home winemakers will use juice - and that will already have sulfites in it to preserve it before the winemaker even gets possession of it. I prefer to use fresh grapes, but sometimes I cannot find a merchant that has fresh grapes of the variety I want. But, I maintain that there is a certain quality that fresh grapes have that juice cannot duplicate.
Sometimes it is best to press immediately after crushing to use only the juice (but note that we’re starting with fresh grapes). This is the case to get a white wine from a grape that has a red skin (i.e., Pinot Grigio).
Another thing to note between wine meant for sacramental purposes and other purposes is aging. That is because the use of wood would be contrary to the rubrics of no additions. Wood adds flavor to the wine, that’s why we use it. In addition to flavor, it helps age it with time - the biggest thing to help this is the tannins in the wood (oak I believe is the best wood in this regard). Without the addition of wood, wine has a flavor that is often described as “young”. It also will very likely be harsh in its flavor (the tannins would help this out immensely).
The bottom line of differences is that commercial winemaking will emphasis the science while home winemaking will emphasis the art.
If you are interested in winemaking, I can recommend some books and periodicals.
Any more questions?