I think the difference is only the following - if the pivotpoint is at the rear, as mine is, the angle is less than if you did it where the pivot angle was closer to centerline of the board (Phils foil diagram).
It doesn't really matter how exactly you do it, just make sure the angle of attack does not exceed 1,5 degrees (aprox.).
I believe you sail with the boards partially raised sometimes, at least when reaching. Phil's geometry is best when the foil is partially raised.
