I think home is still more based off of 98 than 2000...
"It's also worth mentioning that Home Edition will support upgrades from Windows 98, 98 SE, and Millennium Edition (Me), but not from Windows 95, NT 4.0 Workstation, or Windows 2000 Professional. You can upgrade from Windows 98, 98 SE, Millennium Edition (Me), Windows NT 4.0 Workstation, or Windows 2000 Professional to Windows XP Professional."
It won't support upgrades from 2000 pro, but it will from 98... I know this isn't the best thing to base it off of, but the reason I said it in the first place was that I was told that by a prof in an operating systems class... I didn't do a whole lot of research into it myself, so I could be wrong in saying that...
Source:
Paul Thurrott's SuperSite for Windows