Question [Q] Apps on SD + FolderMount?

Hi,
I have a rooted 4.2.2 Samsung GT-I9105P.
I am using AppMgr III to move apps to SD, and also am using FolderMount to move the entire 0 folder (internal user storage/virtual memory card), which indeed frees up some space.
But I'm puzzled if there's any need to move the apps with AppMgr III in this case. Do apps store their movable data only in the internal user storage or somewhere else, too, thus making moving apps still worth it?
Thanks in advance for your answers.