I get confused on that as well- particularly with Rips response to the recent poster fat guy squatting- his bar position in vids was low bar (spine of scapula) but Rip called it high bar squat- I think because his head was up and his movement seemed to engage the quads more.
For me, when my gaze is directed downards I feel the hip drive alot differently- that seems to work best as 'the cue'