Okay, I think I am getting a handle on this. First of all, Maid-Rite sandwiches are browned or steamed ground beef mixed with various stuff and served on a bun. See recipes. My Loose Meat Sandwich is just browned and well-drained ground beef on a bun, period. MEAT, BUN, NOTHING ELSE.
So, a Maid-Rite is a sandwich that includes loose meat, but it is not a pure loose meat sandwich. In fact, some of the “stuff” added in may very well cause the meat to stick together. I would say Maid-Rite is using the description loose meat loosely.