There are 2 types of sway control for a TT. There is a friction sway bar and there are wdh that have integrated sway control. Both the Reese dual cam and the equal-i-zer are wdh with integrated sway control. The difference is in the type of friction they apply. The friction sway bar is a term used to describe one type while wdh w/ integrated sway control describes the other. friction sway bars are recommended for under 26' while integrated sway control is recommended for over 26'.
wdh w/integrated sway control pics
Reese dual cam
equalizer
friction sway bars
Here is some reading to help you out....
wdh on etrailerhow stuff worksrv.net how wdh worksrv.net how to set up wdh
