Don't know who makes them, but they are "Perfect Game" balls. Seams are MLB height. I was talking to a PG guy at the last tournament and he said they are not MLB balls, but the seams were the same. His comment was "If you can throw a curveball with these seams, you can throw them with anything." They are definetely less raised than HS or standard tournament balls.
First time my son was in a PG event, he made the same comment. "Man, there are no seams on this ball". Hope that helps. Others may have more specific details on the balls and who makes them.