different in magnitude relative to
decreased in magnitude relative to
This relation is used to determine the 'directionality' of relative qualities such as 'decreased strength', relative to the parent type, 'strength'.
q1 decreased_in_magnitude_relative_to q2 if and only if magnitude(q1) < magnitude(q2). Here, magnitude(q) is a function that maps a quality to a unit-invariant scale.
quality