In his book "Walking the Tycoons’ Rope", Hong Kong attorney Robert Wang described their rivalry, noting: "The difference between No. 1 and No. 2 is huge." "The former gets all the attention," he said.

Intercoms can either be universal or integrated fit; they are either designed to fit any helmet and generally sit as a control unit outside of the shell, or they can be integrated, designed ...

A universal fit usually has external mounting and means you can swap your headset between multiple helmets. An integrated fit usually means internal mounting with custom-made apertures and fitting.