Poser,
As usual you have no idea what you're blathering about. The cab and chassis suspension is very different than dually pickups.
I owned two before I bought the cab and chassis in part for that very reason. I got tired of the weak rear suspension in my '06 dually. My c&c doesn't sag under a heavy trailer and doesn't shudder on launch with a fifthwheel or gooseneck dump trailer loaded with gravel.
I knew that posting that you would step in your own BS, why is the C&C suspension so much more stiffer than the regular suspension? Its because if you buy a C&C, you mean to use the truck as trucks are intended, and not to feel like your in a Cadillac. The reason the regular 1 Ton trucks, and this goes for all makes, seem to have weak springs is because the manufactures intended it, to give a better ride for the owners that want both worlds. Your truck wore out because you continuously overloaded the rear springs, you have admitted this in person to my face bragging about how much your Mighty Dodge truck was capable of, when in reality you needed a C&C or medium duty truck.
Again, the regular 1 Ton trucks of all brands have lighter duty springs to give a better ride for the masses who want that, and not the buck board ride.