This is true but it is based off of Windows XP. Yes its hard to distinguish which it would be based after since there is little change between home/pro. If I had to guess I would say the home version just because MCE is meant for people at home and not a professional enterprise DOMAIN env.
Actually that is one way you can check is if you right-click on My Computer, select properties, Computer Name and CHANGE does it have a field for DOMAIN? Also if you go to Control Panel>Folder options>VIEW and scroll down to the bottom is there an option to check/uncheck "user simple file sharing"? If both of those answers are no it is safe to say it is based off the XP home model