Tapestry crochet is usually used for fabrics which will only be seen from one side such as tapestries, pillows, and some wearables.
Corner to corner crochet, also known as C2C, is most often used to make blankets using a graph.
Mosaic Overlay crochet uses a graph and alternating rows of two colors to create a single sided fabric by managing which color is visible. This is usually for intricate repeating patterns for final products that only need to be viewed from one side.