What's the difference between shape tweening in Flash CS4 and traditional tweening?

Shape tweening is a deformation tweening animation between vector graphs, for example, the circle becomes a square, or the letter A becomes the letter B, and this tweening animation changes the nature of the graph itself. In flash, this tweening requirement only applies to vector diagrams. General words or charts need to be dispersed into vector diagrams to manipulate shapes. The traditional tweening is the so-called animated quilt, which generally needs to be turned into a component. The traditional tweening changes not the nature of the figure itself, but the external properties, such as size change, angle change and so on.