Comparing duplicity to something a deduplicating software suite is not really correct, they don't even provide the same functionality (like mounting snapshots,

Comparing duplicity to something a deduplicating software suite is not really correct, they don't even provide the same functionality (like mounting snapshots, like handling moving around of the files on the hard drive, like space-efficiently backing up files from different machines, like smart and efficient pruning, like speed of access(impossible for duplicity to achieve), etc.).