It is now the job of the matrix to release this used diamond and expose a new sharp diamond that is buried inside. Remember that there are diamonds hidden inside the matrix from top to bottom, side to side and end to end. As the blade is pushed through the cut, the matrix is designed to scrape away and expose another new diamond. As they are more abrasive they can erode the matrix more quickly, thus causing premature wear. It is for this reason that application information is critical.
Manufacturers make available specification charts for various applications.
The essential difference in recommendations is the hardness of the matrix, which controls how quickly a blade wears. Consider two materials, green concrete and granite. The blade required to cut the green concrete will have a harder matrix to resist premature blade wear, while the granite blade will have a softer matrix to allow for easier erosion on this relatively smooth material. If the granite blade was used on green concrete the soft matrix would result in poor blade life. If, on the other hand, the green concrete blade was used to cut the granite, harder matrix would not allow any new diamond to be exposed.