Amerish.... so many beautiful vistas to see, so many freakin' aircraft to shoot down. My buddy and I were just patrolling as a double-burster MAX/engie combo in the mountains on the east side of the map. It was like playing Duck Hunt in HD. The visuals difference in this game between medium and high settings is something every PS2 player should see at least once.
Also, I believe the continents are on different builds with Amerish being on the latest one. I was on Indar and alt-tabbed out and saw it on build .317 and when I talk-tabbed on Amerish it was on build .4-something.
They really need to add all the graphic polish to the other 2 continents.