Yes, he quickly sold them to a friend who could resell them to the China market. He mentions how much he gets for Pros versus other phones, and that he specifically looks at the camera module.
I think I would be hard pressed to tell the difference between a 15 and a 15 Pro with a case on without seeing the cameras. They are the same size display, same shape, same Dynamic Island, etc. They both have unique colors, so it’s easier without a case.