2005-2009 Power wagon should be 140.5" wheelbase, and yes they are flex monsters. Dual solid axle helps a ton.That makes sense but also you would think the longer wheelbase would cause the truck to stay flatter and use more of its articulation vertically.
But it kinda makes the who comparison moot. A Ram Powerwagon with a 149" wheelbase getting a 655 RTI must absolutely destroy a 200 series in terms of actual wheel articulation.