Neither is inherently superior to the other; both share the same dBNeutralizer material that does the job. Cone/Spike Decoupling Gliders are a little beefier and therefore have more capacity to isolate a heavier and more severe vibrational load; they'd be more appropriate for heavier floor-standing loudspeakers in most cases. But then, if a "beefier" Hush Puckie were needed, Extra-Thick Hush Puckies or Fat Grounding Bases could be used instead of the standard Hush Puckies.
Cone/Spike Decoupling Gliders also have the advantage that they can be used on bare or carpeted floor, whereas Hush Puckies are limited to bare floors or very thin carpet.
The choice would often filter down to whether or not mobility would be beneficial. With loudspeakers, it's virtually always an advantage, usually a real necessity, to be able to move the speakers a little from time to time. With a rack, mobility may or may not be a consideration. With a component on a shelf or platform, like a turntable on cone feet, Hush Puckies would of course be the appropriate choice.
Steve
Herbie's Audio Lab
