There are various interpretations... (Genesis' quote)
Later in crisis core, that Banora place is ruined and is filled with lifestream, everybody knows that, i know.
However in FFVII, the Mideel place, although someone mentioned that it is 'unstable with lifestream flowing beneath it', the place looks unusually fine and peaceful, as if nothing has ever happened before like that of in Banora.
All in all i believe that those two places mentioned are of different place but within the same area or just located nearby.
Or perhaps the soil properties of the two places are of the same kind...
Urgh what am i bluffing about? But well, that's how i think...