Plus is a good value, but it won't work for what you are trying to do. The Playstation Plus online storage for the Vita, and the online storage for the PS3, are completely separate. It can't be used to move save data between the PS3 and the Vita. That is done using a different cloud storage system, that is only accessible in-game from games that support cross-save function, such as MLB12 The Show. As Madden 13 is not a cross-save title, there is no way to copy your PS3 save data to the Vita. Maybe next year.