“Other than that it was blah safety blah stability blah confidence blah no real numbers or ratings blah.” That’s a nice “Best in class” response. It’s no different then as to why the F250 PS is a better choice even with its lower payload ratings, weight. As to real world XD numbers there’s no secrets, they’re readily available around the web. My particular truck has a RAWR of 4900lbs and a payload of 1820lbs. Hitch rating is 1200 with WD recommended above 5k not required, max pin weight is 1771lbs. The frame is 68% 440/540 MPa , 32% 370/390 MPa HSS.
