Theoretically speaking if a clockwise rotation (anterior downgraft) was done to the same extent a CCW rotation posterior downgraft can be done, equal extents of rotations would result in perhaps what you are thinking. But pragmatically, an anterior downgraft (CW-r) never reaches the extent that a posterior downgraft (CCW-r) can reach.
Airway opening is a function of the extent of a rotation. But extent of rotation, in turn, is a function of of the longest distance of a WEDGE shape and where the wedge shape is found. For example (to keep it simple) a posterior downgraft for CCW rotation is (basically) the shape of a wedge where the longest distance is at the back of the wedge and the back of the wedge is at the very back of the maxilla. So, one could have a distance of that section of the wedge of approx 10mm . Now an anterior downgraft for CW rotation would have the longest distance to a wedge to the FRONT of the maxilla which, for example, could be done for more tooth show. But for more tooth show, the EXTENT of the longest distance of the wedge shape to do it would NEVER be as much as 10mm as is the case with some CCW posterior downgrafts. Like no one would need an anterior downgraft of 10mm for more tooth show.
