As you can see in the second example in the article, there are changes. There's a 4:3 original, followed by the naive widescreen version, followed by a widescr

As you can see in the second example in the article, there are changes. There's a 4:3 original, followed by the naive widescreen version, followed by a widescreen version that has been edited to try to preserve more of the original intent. Cropping back to 4:3 will no longer get you the original scene.