A Lenovo X240 costs $1249. The most expensive MacBook air costs $1249.
The Lenovo has i3, the Air has i5.
The Lenovo is 12.5", the Air is 13".
The Lenovo has Intel Graphics 4400, the Air has 5000.
The Lenovo is 2-3 times thicker than the Air, and has the 4 hours less battery life.
The Lenovo does not have 802.11ac
The Lenovo is made of an ugly plastic.
Seriously. What the hell was Lenovo thinking?