I'm under the impression the OR has thinner anti-roll bars to allow for more articulation. That could account for more body roll.
The 7.3 0-60 is almost unbelieveable... I wounder if they got a "massaged" ;-) X for the test (manufacturers have been known to do this), that or the final drive ratio for the OR is lower... 4.10's? the article states 3.56 but that may be for the automatic.
They noted an ave MPG of about 15. Ouch. they must had their feet on the skinny pedal a lot. Agree with the comments on the brakes though.