Maintain duplicate files with same/ different names on a Windows NTFS drive? Use junctions, symbolic or hard links?

Question

Maintain duplicate files with same/ different names on a Windows NTFS drive? Use junctions, symbolic or hard links?

I've read junctions, symbolic links and hard links, but its unclear how the relationships work when the duplicate files are same/ different names and how to eliminate the double space being taken on disk.

How to move/ or delete:

• the second copy {the duplicate being eliminated from disk space}
• the first copy {the duplicate holding the file data on disk space for both files}