Think of treads (ignore slicks because we can't run 'em legally) as a continuum: knobby and blocky = bad, ribby and non-blocky = good; the closer to solid ribs the better. The pro-contact has so many sipes I would think that makes for a squishy tread. I'd think the nearly solid center ribs on the Integritys and Avid Tourings are a good indicator of likely low r.r.. Of course there is an element of armchair aero in this; but in the absence of good data what else is there?
About 3 days after I bought new tires I found Integrities on close out for dirt cheap!
Oh well, the Falkens I bought have the right visual indicators for low r.r. AND are rated to 51 psi so they should be good too.