[fcatwo]

No difference -- Just two commonly used names for the same thing. The situation is further confused by the fact that one WDH manufacturer is named Equal-i-zer so when someone uses the word "equalizer" they may mean that brand of WDH or just any WDH. Usually they mean any WDH but sometimes you just have to guess. Equalizer (capitalized) falls into the guessing category. WDH stands for weight-distributing-hitch and usually implies the use of some form of spring bars to distribute part of the hitch weight forward to the front axle of the TV and back to the trailer axle(s).

Various forms of sway (fishtailing) control are often added to WDH's but everyone (except those people who have experienced it) knows TMs don't sway.