No, let's say you're in Feralheart+ and you see a map from the original Feralheart itself some where.
You go inside, and you see lots of people/some people. They are probably in Feralheart, the original one. Well, most of them. That's what I meant. :3 But, if the map is named different then that means that you'll only see people from Feralheart+ only, or people who copied maps from FH+ into their original FH.
Hope I made sense. ^.^