Well, since it isn't open source - how does it compare with crashplan (another closed source, data deduplicating, free for personal use, cross platform backup solution...)
BTW, why does your comparison table says "Full Snapshot: No" for duplicity?
One can definitely use `duplicity full` to explicitly ask for a full backup.
By "full snapshot" I meant an incremental backup that still appears to be a full one. A full backup in duplicity is not an incremental backup so it is not qualified as a full "snapshot".