Difference Between Duplicating?
Taken from the answer the OP added to the question:

When a directory or a file is duplicated, the (access) rights of the original file are usually not copied and the new file is owned by the copying user. However, if a Mac is used by several users or if network drives are involved, it can make sense not to make a file accessible to everyone.  To do this, right-click on a file, press OptShift and select &quot;Duplicate exactly&quot;. This ensures that owner and access rights are copied as well.