I think it means.. they look identical by eye.. but that could just be my interpretation of .. "visually identical "
The two circuit boards were clearly designed by the same person/persons at some point in their lives. I mean why would RED include mounting holes for the white connector shown on the DVS board, if they weren't going to use them? There are other small differences in the components on the boards, but they appear to have been designed with universality in mind. In other places there are solder pads where no chip is fitted on either board.
This is not like a radio circuit where the layout is critical; two people given the task of designing circuit boards for the same system would likely create completely different (but functionally identical) designs.
So the hardware wouldn't have been designed by RED, and certainly not by Jarred Land :-)
(It's like the RED sensors; if they're really "bespoke" designs specifically crafted to the needs of cinematographers, then why are they all 16:9 and not 4:3 like the Arri sensors, which we know were designed for them by the Fraunhofer Institute).