“Just know the old nomenclature of 1/2 ton or 3/4 ton doesn't mean much anymore.”
As in actual payload numbers being 1000 and 1500lbs, yes you’re correct.
But with respect to the vehicles construction and components, they are night and day with really the only carryover between the models being possibly 1 engine option and typically just ancillary components like interiors or sheet metal. And even that is different in a lot of cases.
The meat and potatoes of each are nothing alike. But nice justification for your heavy half ton.