Actually, they are pixel by pixel the same. (my almost autistic pattern matching at work again)
@Pat after zooming in i find they do appear mostly identical, except there are a few small anomalies where they seem to differ by a pixel or two oddly enough.
Actually, the pixels in the area within the squares are the same, it's the background pixels in the blown-up image that are different. It looks like whoever made this graphic just copied and pasted the same square pattern in the two different locations over the background.
@Pat sort of, they are both randomized by the same parameters. But being random they differ on a pizel by pixel basis