Saudi Arabia may be bigger than Iran, it may be many times richer than Iran due to its well-developed oil and gas industries, but its population is much smaller (33 million Saudis as opposed to 81 million Iranians) and militarily it is not confident about its ability to take on its Persian neighbour if this cold war ever turns hot and their forces confront each other directly. Each side has ambitions to be the dominant power in the region, and each regards itself as the champion of its respective version of Islam.
