I obviously like the first one more.
I think the shot would benefit if the trucks were going the other way around. From left to right.
I envision the airplanes flying above you, not actually in the background. I would make them cross above the camera and leave in the horizon at the right side of the tallest building. This way you are actually placing the audience inside the action, rather than just being witness to it.
Numbers are movement. Camera and trucks are already moving when you enter the shot. Then the birds feel the incoming aircraft and fly away, then the aircraft fly over.
Just my two cents :)