Mount points in NTFS are similar to soft links in that they both use reparse points but they differ in their use and setup.
Mount points can be assigned to any EMPTY directory and they use a Volume ID instead of a path name so they can reference a Volume that doesn't even have a drive letter. Once a mount point is set a Volume and all its directory's will appear under the mount point directory as if it were on the same disc.
Mount points are only available on NTFS basic volumes but they can mount volumes formatted with any file system windows understands such as FAT32 or UDFS. A limitation of mount points as currently implemented is that they only work with local storage.
I will explain a bit more as soon as I see if this Blog post works ?