They aren't though, 4-1-3-2 is not 4-4-2, it has a holding midfielder, and does not have '2 banks of 4'.
4-4-1-1 isn't fundamentally 4-4-2 is it? Look at the difference in our play when we moved from 4-4-1-1 to 4-4-2. Also, the CAM in a 4-4-1-1 creates natural triangles which 4-4-2 doesn't have.