Ratchet and Clank: QFB is mostly the same as ToD although without Clank but its still as fun as the rest...
Gameplay: Basically the same as always, although with less weapons but a bit more new options with the wrench, but everything still feels the same.
Graphics: Exactly the same as ToD since they used the same engine, still fun to watch.
Difficulty: To me the Difficulty is still easy, not too easy but they kindof improved in a way. Although in this game they actually included 3 diffrent difficulty settings, i would say it is a slight improvement.
Music/Sound: Well the voice acting is still good as always, although i like the music of the main theme of the game it gives u the Treasure hunting feeling.
Ratchet and Clank Future: Quest for Booty isn't an improvement over Tools of Destruction although its still welcomed in the PS3 Library and still fun to play. I was kindof dissappointed about the ending (not a spoiler) although can't wait for the next one coming Fall 2009