I love this picture cause you can see the differences between the two gargoyles, the top is decorative, not hunched over, the bottom one is definitely a water spout due to its posture. this shows great levels of the different decorations.
CHAP Shown here is a triforium. This is in the Cathedral Chartres, France. Interior, north nave elevation looking east from triforium. A triforium is a second story gallery overlooking the nave with windows on its exterior walls.