My main issue with the DC is that often the setup results in the bars at a severe downhill angle.... Very little ground clearance. This is a big deal for my usage. The EQUALIZER, setup properly has the bars parallel to the TT frame. Much better GC.
As for how they each reduce sway, they are different, but both are effective.
The DC fans fixate on what the cams do.... Letting the TT freely return to center.
What they do not understand is that, yes the cams do resist sway moving away from center, but not towards center,,,,even though motion returning to center is STILL a sway event! Sway is a back and forth motion much like a dogs tail. The EQUALIZER dampens sway in BOTH directions. Perhaps with less resistance that the DC when it is moving away from center, but with much more resistance when moving to center. So the net result is about the same.