What is the difference between Briggs intek and Briggs diamond I C?

Intek Pro, Vanguard, and I/C engines are for heavier duty Industrial/Commercial applications. The cylinder has a cast-iron sleeve insert. Standard Intek and Powerbuilt have an aluminum cylinder wall. These are for general and consumer use. Diamond refers to a Diamond Bore cylinder, a special preparation of the cylinder for better wear and oil consumption.