Tales of Vesperia PS3 to have Branching Storylines!!!

[WereKitten]

DeotoxSlayer said:
...

-With the assumption that it might sell in addition to the 360 version, they started the PS3 version.
-They're putting in all the things that were sadly cut due to space limits.
-Depending on the player's actions, the story might branch off, and the characters that join will change?

...

Source: http://rpgmonkey.blogspot.com/

This is also interesting. Not time or budget, but space.

Why didn't they go on multiple DVDs? If MS doesn't actually ask extra license money for multiple discs, what are the extra costs?