As a general rule, most products will work on a variety of cleaning tasks. We do, however, make products for a specific function. Pre-sprays have solvents, surfactants and builders designed for alklainity and less for rinsing ability. Most rinses products are builders primarily for rinsing at high dilutions along with penetrating surfactants which also work at high dilution. At high dilution solvents do not perform and strength of alkalinity is significantly reduced. A pre-spray is not a good rinse, and a rinse is not a good pre-spray. In a pinch, they can replace one another, but will not work as well as a products designed for specific tasks. However, a cleaner has to select the fewest number of products that can effectively do the majority of its work in order to keep it as simple as possible for everyone involved.