[Duplicity-talk] command differences between duplicity and rsync !?

[SYNass IT Ubuntu / Linux]

Hi all
Im my very first preparations for an intelligent Backup Solution
I got pointed to rsync ...
... and somewhat later to Duplicity ! ;-)

I am not only new to Duplicity / rsync ...
... I am also quite green / newbie to Linux !! ;-))

Can you advice and guidance me thru the 
important command differences between these two ??

Command used with rsync is:
rsync -av --progress /source /target

Important for me is: NO encryption and 
other hints and warnings are very appreciated too. ;-D

TIA and cheers
svobi