I thought there was some mention of it having more tools installed, but I cannot find it. I agree that it ought to at least have a comparably minimum mention
here as does the minimal CD.
I'm fine with live environments existing, but I don't use them. Primarily I don't want to have to download unnecessary (for me) gigabytes of GUI and then deal with a painfully slow environment for the 5 minutes I'm in that environment.
While looking for a description of the admin CD, I did notice a "
live-GUI", though I'm only guessing that it is a new iteration of the old LiveDVD.
And now that I'm thinking about it, I may be incorrectly recalling that the Admin CD was originally an internal tool, so perhaps that could be why it never got any documentation. As an example, see also: Catalyst.