Sand is large and blocky, it does not compact. If your soil test shows that your largest layer is sand. You will have soil that warms up earlier in the spring, drains well, and dries quickly. Sandy soils require a lot more nutrients. You only have a little work to do for a happy garden as long as you continuously add nutrients.
Silt is plackey, it dries in layers with a little fiber.
With the addition of a little clay and sand and more fiber you can make this an outstanding soil. Clay is extremely fine and contains no spaces between particles. Water collects and dries slowly. The best thing about clay soil is that it is very rich. The goal is to achieve for most all plantings is a mix called loam.