I use the Dual Cam, and my trailer tows sweet. A properly set up Dual Cam will keep you in a straight line going down the road, where I would think the Equalizer will tend to keep your combo at the last turn angle (never used an Equalizer, so this is speculation). I do notice with my Dual Cam when approaching a curve, that my truck wants to go a little straighter than without the trailer, but is easily overcome (classic understeer ??).
The Dual Cam is plenty noisy, even with Vaseline on the cam lobes.
Beware if you get the trunnion bar setup with the Dual Cam. If you have a 6" tongue frame, and the coupler is welded on top of the frame, there could be a spring bar rub against the cam yoke, or frame plate bolt. I had to go with a 1" raised ball to clear the frame plate bolt, and it still rubs the yoke during a hard turn. This doesn't happen with a 5" or less frame, the coupler welded to the bottom of the tongue frame, or the round bar setup.
Chap , DW Joy, and Fur Baby Sango
2006 Ford F150 Super Cab 4x4
2008 Surveyor 263