Just got megaScenery

Ok...went to best buy to pick up Battlefield 2, only to learn that it isn't in stores yet...but instead picked up MegaScenery USA2004 (San Fran, Sacramento, and Surrounding Areas), and MegaCity Denver 2005....
(I know, I know, I'm an impulse buyer...
)
...but my question is, whats the difference between MegaScenery San Fran, and MegaCity san Fran?
Thanks..!
(I know, I know, I'm an impulse buyer...

...but my question is, whats the difference between MegaScenery San Fran, and MegaCity san Fran?
Thanks..!