Where the pigs come from have absolutely nothing to do with whether or not they get along.
I answered you once about where to get your pig. We NEVER recommend purchasing a pig from a pet store. Those pigs are bred and raised in horrible conditions. They're often sold sick, mis-sexed, with parasites, and the baby sows are pregnant. The breeding sows are kept continually pregnant, and the pups are often inbred. If you buy one from a store, you're just participating in that chain of abuse. If you get one from a rescue, you get a pig that needs a home, and you free up a space for another pig to be saved.