You now have a choice of unlocking another FastFind scene: St. Peter's

St. Peter's (10)

St. Peter's Scene requests

Once you have completed the 60 second game it offers you the opportunity to post your high score to your wall to encourage your friends to challenge you.

The difference between the Guardian Challenge and the FastFind is just the ability to chose which scene to play and give the opportunity for any of all your friends to beat your best score.