Transfering accounts from one to another server with WHM

There is option to transfer/copy account with password and ordinary copy. What is the difference between this two options. If I choose with password then password is asked and I don't know my clients passwords ' What options to choose so complete account will be transfered (e-mails, passwords, materials) ?

And what about preset packages I had on old server . How can I transfer this setup ?

Both servers are running CPanel/WHM 6 but different releases

 

 

 

 

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