The screen on the Air does arguably have inferior colours, though it is a pretty subtle difference. Viewing angles are a little worse as well. On the other hand, as long as your eyesight can handle it, the sharpness of the Air screen probably makes it the superior option for reading and editing text. That is about the only thing I find slightly disappointing about the Pro but even then it is not terrible.
on the demo video when the screen is white you can't tell. in the main desktop window with the galaxy picture it's pretty clear how worse the Air screen is