The Irrelevance of Speed vs. Directional Shear
We know that vertical wind shear is created both by changes in wind speed with height (speed shear) and changes in wind direction with height (directional shear). The type of shear, however, tells us little about the shape of the hodograph since it refers to the speed and direction of the wind and not the wind shear vector.
It is true that speed shear alone results in a straight hodograph (unidirectional shear), and that directional shear alone results in a curved hodograph (the shear vector turns with height), but combinations of the two can create any kind of pattern.
Compare shear types and hodograph shape.