1. B-1 versus B-2: What is the real difference, between the B-1 and the B-2? The B-1 and B-2 visas are usually given together as a combined B-1/B-2 stamp.. The B-1 visa and the B-2 visa actually cover different things that people do when they visit the United States. B-1 (Business): This is for business activities that do not involve getting a salary in the United States. The Business visa is used for things, like talking about contracts taking care of estates going to confer