The deciding factor in competition shoes is a low weight. In order to reduce strain, especially over longer distances, the manufacturers of competition shoes aim for a combination of low weight, slight damping and dynamic stability. This means the midsole should be as light as possible, and consequently, the damping is less than that of neutral or supportive shoes. This supports a dynamic rolling motion and allows for higher speeds.
Take the Mizuno Wave Aero 14 as an example of a competition shoe.