Martin Logan 60XTi measurements from NRC
here
Bowers 702 S2 measurements from Stereophile
here
Unfortunately two different measurement techniques, so it's not an exact apples-to-apples comparison. But it's better than nothing.
B&W sensitivity might be a little higher, but not a big difference. Both appear to be modestly difficult loads in terms of impedance. But your Parasound can probably handle either without much problem.
ML appears smoother in the treble. Both appear to have exaggerated midbass, but here it's really hard to compare measurements or to trust the NRC measurements since the ML is rear ported.
My conclusion: There are a lot of better speakers than either of these in this price range. Revel, KEF, Ascend, Monitor Audio Silver 300, Salk all come to mind. I'd probably say the Focal Arias, too, even though you said you were unimpressed.
Note: Just added some edits a couple minutes after posting.