I will soon have a much fuller response to your last question, but a few remarks before that.
We have been towing fifth-wheels (four different units from four different brands), over 160,000 miles, all over the USA. We have had nothing but Reese hitches (just happened that way) and on the last two trailers have had the TrailAir hitch ed: PIN BOX (the basic model). We have never had "chucking" to the extent that we were bothered by it, but the TrailAir does smooth out the rough places. Glad we have it, though it does require frequent airing up.
Now, the reason I respond. We recently bought a new truck with came with a Curt hitch already installed. We have made only one short trip, but it seemed to tow exactly like our old hitch--no problem.
We have a trip planned to go from East Texas to Banff, Alberta in July/August. After that trip I will be able to give you a more complete answer, but it looks good at the beginning.