Hmm, I don't know about any accuracy potential advantages of the rotating barrel design. If money flew in the wind I'd love to have a rotating barrel action pistol with a single action trigger with 1911 ergos for a more "apples to apples" comparison.
The defensive nature of the Beretta is apparent with the shorter barrels and subsequently sight radii as well as the traditional DA trigger action will keep it far from 1911s in the accuracy department.
The one thing I see in the rotating barrel design is strength and mitigating recoil.
"Necessity is the plea of every infringement of human freedom. It is the argument of tyrants, it is the creed of slaves." ~ William Pitt, 1783