Ka-pi96 said:
It`s actually pretty similar. 13 shipped 5m the day it released worldwide. 13 did have 2/3 months of Japan sales beforehand but technically they both shipped 5m at the same time as their worldwide launch. |
Do you have a source?
I only found this which says that "Final Fantasy XIII has sold over one million copies in the first five days following the game’s release." talking about the worldwide release excluding Japan.