wmeler wrote:So...question...how do I get that chart version? (On my other laptops, it just shows maya like any other distribution.)
If you want the chart look you can remove the package called software-properties-gtk
wmeler wrote:2) How can I tell that the "LinuxMint Software" tab is for maya specifically vs. some other LinuxMint distro?
You can't really from that app, AFAIK. You can make an educated guess by knowing which release you installed
Looking at the Other Software tab will list the Ubuntu repos that are associated with that particular Mint release, like Precise Pangolin for Mint 13 Maya.
The easiest way to tell is to look directly at the /etc/apt/source.list
file. That's the file that's being parsed by the Software Sources app.