[EdZ]

Not exactly where I was going with that . . .

Quantitatively, the larger disc has a larger moment of inertia, whereas the smaller disc has a smaller moment of inertia

In this statement consider the different discs as the different Pulley diameters we G.O.L.F.ers have as options. When the straight line motion diverts in to rotational motion of a small pulley the club WHIPS around the pulley because it is easily accelerated due to the mass being closer to the center of rotation. However with a large Pulley more hand speed is required because the mass is by definition farther from the center of rotation. But at the same time this works with you because you have more inertia and thus your Rhythm is easier to maintain with a larger Pulley. So the larger pulley is more about geometry and the small more about physics at the potential destruction of geometry if there is too much load placed on the system.

So it would appear circle delivery path, or rather near to it, if properly understood and utilized, can be very useful for distance control and sustaining the line of compression due to increased mass - less variation in initial ball speed for a given hand speed - vs. a snap release and its stricter Rhythm requirements. All of which assumes of course, that the circle delivery path is still impacting the ball up plane, before low point of the clubhead.