The MacBook Air is "superior" in two objective specs: speed & price. That's honestly it, and it's not even that much faster. It also has more ports & a more traditional keyboard/trackpad, but those are subjective differences.
The two people I know with them can barely tell the difference between the Air keyboard and their MacBook keyboard, didn't realize the Force Touch trackpad wasn't a physical click, and only ever plug their computer into a charger or a projector which required an adapter on the Air anyways.
The MacBook blows the Air out of the water in every other way. Design, weight, thickness it's not even a contest. The screen is orders of magnitude better. Battery life is better, sleep/wake response is better, power draw is lower, charging is faster.