The parent company, Lactalius, has three plants in the U.S., so there could be variation in the cheese they each produce. Sorrento is made in Buffalo, not sure where Galbani is produced. Lactalius is a French dairy giant, imagine that, French made Italian cheese!
Some Galbani products are produced in at least two locations, Tipton, California (F/K/A Mozzarella Fresca) and Nampa, Idaho:http://www.mozzarellafresca.com/story/awards.phphttp://www.sorrentocheese.com/about/awards.php
I can't find a definitive list of which cheeses are produced at which locations.