Among other light twin-engined airplanes of its generation, the Aztec was known for its good load hauling, long endurance, stable handling, and respectable single-engine performance, at the cost of higher fuel consumption and a draggier (slower) airframe. Part of the drag was due to use of the same basic wing design (albeit with substantially different dimensions and construction) as the Piper Cub series of aircraft. The Piper Cub airfoil gave the Aztec superior short field operation characteristics at the price of lower performance at cruising speeds.

Source: Wikipedia