If you would like to make an exact copy of one of your contact accounts, a clean sync is appropriate. A clean sync involves completely deleting one of your accounts, and then syncing your contacts so that they match.
- First, deleted the contacts in the destination account. To do so, go to Contact Mover > Contacts > Delete All iPhone Contacts, and delete the desired account.
- Next, sync contacts from the source account to the destination account. To do so, go to Contact Mover > Sync/Move > 2-way Sync.
Now your two accounts should exactly match.