With Japanese Kurabota, Berkshire, or Mangalitsa, there is a huge difference in flavor, marbling and tender texture compared to the commercial American Large White. But that difference can only be really appreciated by using simple Dry Heat preparations, cooking it no more than Medium. Salt, Pepper, maybe a light application of SPOG and Grilled or Broiled. Or Pan seared or Roasted and complimented with a light reduction pan sauce. These and a few other Heritage breed meats areTotally worth the Premium as is A5 Wagyu or Kobe Beef as compared to a Costco Ribeye, if you KISS it...But none of these meats are worth the money if you are going to Marinate, Inject, add a 10 Ingredient Rub, Smoke low and slow, 15 hours to 205, then douse with a Vinegar or Thick Sweet BBQ Sauce!
Low and Slow BBQ, with or without Smoke, Stewing and Braising, were all developed to take the crappiest, tough or undesirable cuts of meat like Tails, Tongues, Feet, Heads, Shoulders and Hocks, and make them into, melt in your mouth, tender and flavorful meals.
Of the Domestic Pork Brands? There is little to no difference. They ALL use the American Large White, bred to be long, lean and reach market weight in around 16 weeks. Even their Diets of Soy, Corn and a few other grains are pretty much the same. Same Breed + Same Diet = Same Flavor and Tenderness, regardless of the name on the label...JJ