Well yea that is true I was just giving a generalized statement to the relation between the roll and the tail imputs. You still have to fly the airplane! Even when you are doing a rolling circle no two stick movements are exactly the same through the circle to keep the turn rate/ roll rate constant, same applies to the rolling loop. You will find that it does take less tail imput across the top of the loop as does the bottom, but that comes with practice and learning to feel the airplane and what it need through the maneuver. Practice make perfect.