The RG59 and the RG6 are two types of coaxial cables--electric cables that are used to transmit frequency signals for radios, TVs and computer networks. The RG59 and the RG6 differ in manufacture, application use and capabilities.
RG59 is especially designed for applications that require lower frequencies than 50MHz, such as high-definition TV, which requires one around 37MHz.
The RG59 is too thin to reach GHz levels and thus deliver the best signal quality possible, and its lack of a foil shield prevents it from use for satellite feeds or cable installations.
The RG6 is thicker and has a larger center conductor. This gives it a better signal quality than the RG59. Also, the RG6 is ideal for satellite and cable signals and voltage.
The RG6 cannot operate below a frequency of 50MHz. Thus it is ruled out from use for video projectors, component video and plasma TVs.
With the continuing advancement in communications systems, use of the RG6 would continue to increase over that of the RG59.