If the title confuse let me explain. When Agito was first announced as Final Fantasy Agito XIII. IN 2011 the name was changed so that the XIII was dropped and instead called Final Fantasy Type 0 for the PSP. Once again the XIII has been added to the name. I must admit I have no idea if this changes anything about the game as just like versus very little is known about it.
Article: http://gematsu.com/2013/05/square-enix-japan-trademarks-final-fantasy-agito
As always thank you for reading.