Ok.. recovery... BACKS UP EVERYTHING... including the operating system etc...
This is done in RECOVERY
Titanium.. yes backs up specific chosen apps and data.. games, system apps, text messages, etc...
This is done WITH Titanium from inside the OS.
Example.. (If your not a super geek like me and still use the data partition from recovery to achieve this)
Hey, I wanna try that new ROM. Looks cool. Ok let me backup all my games and data for it so I can play it from where I am on my new ROM I wanna try...
Start up Titanium, choose to backup Game and Data...
Ok, now I can install that new ROM from RECOVERY.
Boot into recovery... Install ROM, Boot into new ROM
Hey, wow... this ROM is cool.. only wish I still had my saved games and stuff... OH WAIT! TITANIUM BACKUP!
Download Titanuim and RESTORE your game and data...
TADA!
Data restored.. you didnt have to start over.
*** I used a game as the example cause its easiest to imagine ***
Hope that helped