Replicate v. Duplicate?

DEVONthink Scenarios
#1

Could someone explain the technical difference(s) between “Replicate To” and “Duplicate To”?

Help says:
Duplicate To > …: Duplicates the selected group to the group you select from the submenu.
Replicate To > …: Replicates the selected group to the group you select from the submenu.

This isn’t much help as In common English these words are often interchangeable:
du·pli·cate: To make an exact copy of.
rep·li·cate: To duplicate, copy, reproduce, or repeat.

Any ideas?

#2

Duplicate a file. Result: Two files. Change one, the other’s not affected. With a significant change to one, suddenly there are still two files, but they are no longer duplicates.

Replicate a file. Result: One file with two (or more) instances, which can be placed in different locations. Change one instance and the other instance(s) is/are also changed.

#3