differing CCC & tow rating same manufacter same floor plan

It's nice the mfr shows empty weight and I know some mfr's say they actually weigh each completed unit. Still, more and more, I'm convinced the only safe way to know what the weight capacities are is to weigh the thing. Include a truck stop on the test drive. Adjust tire pressures and weigh it. That'll help your test drive and your capacity decisions.

You listed both coaches a 2015 and a post above said the hitch came in 2016. But maybe it was a rolling change, made on some of the 2015's.