If you go strictly by that chart, all pickup style trucks are going to be be over GVWR while carrying a Mammoth. At that point, you should be looking at Chassis models. It’s clear if you look at those charts that the F450 has a higher capacity (about 2800) than the F350, but either has way more GVWR than the pickup versions. Care to guess why the F450 has a much higher rating in chassis form? :D
https://www.fleet.ford.com/fleet-specifications-vdm/?sg=commercial-trucks&category=chassis%20specifications&yr=2019&categoryId=specchassisspecifications&md=ChassisCab&brand=Ford