What is the difference between day fourteen of this and day fourteen of the last one?

Nothing. None at all. There is no test that could find one, and you have looked.

So stop looking for it in the fourteen days. It is not in there.
The difference is entirely in what happens at nine tomorrow morning,
which means it does not exist yet,
which means nobody — including you, especially you — can currently prove a single thing either way.

The Book of the Fallen — Wall 65:8