The lower plane looks to be smaller but because it is closer to the camera it appears to be about the same size making the mind believe that they are at the same level.
"The difference in the comparative size of the planes could also create the illusion.
The lower plane looks to be smaller but because it is closer to the camera it appears to be about the same size making the mind believe that they are at the same level."
Googleized:
Airbus A300 specifications and plane history. ... Wingspan:, 147. Length:, 177.
Boeing 777 specifications and plane history
Wingspan:, 199. Length:, 209. Height:, 60.
COMMENT: If this says anything, it says that the smaller plane has to be pretty close to the larger plane, in order for the optical view to be so proportionately close to the true dimensions.