Apple continues to include Retina displays in its products, but the MacBook Air does not have Retina displays. The 11-inch and 13-inch.
MacBook Airs only feature low-resolution screens. The screen resolution of the 13-inch model is 1440 x 900.
The MacBook’s display is better, with a 12-inch Retina display with a resolution of 2304 x 1440.
Speed
The MacBook uses the energy-efficient Intel Core M processor. However, the Core M processors do not perform as well as the Intel Core i5 / i7 processors currently used in the MacBook Air.