Just recently tried my new 2500 CTD without any sway or weight distribution. Figured that heavy diesel in the front might make it possible. Got a simple hitch that kept the trailer about level, maybe 1" lower in front.
Took it out once and it seemed fine. Then took it out on a windy day, and no. Went back to the Equal-I-Zer.
When/If you do your test run, do it with the worst conditions possible. Do it on a windy/gusty day, do it on the freeway with large trucks zooming past. Do it when you'll really want the sway control.