What are the characteristics of design sketching and traditional sketching what is the difference between

Design sketching is more vivid and full of design than traditional painting, and can be displayed in any medium, not only in the painting tools, as long as you can think of can be combined with the brush to construct a vivid and perfect picture. While traditional drawing is mostly used for art painting tools, using the brush to create a beautiful picture, traditional sketching compared to the design of sketching in the expression of the method seems to be a little more subtle, while the design of sketching due to the use of tools are not restricted, so more bold and more creative color.