I didn't respond to your original inquiry because I have not heard the square line from Wilson Benesch HOWEVER, I have owned quite a number of speakers:Wilson Benesch Arcs, AZ Adagios, SF Amati Homage, Wilson Audio Duettes (twice), Harbeth compact 7's/SHL5/40.1's and I have now settled in with Wilson Benesch A.C.T floorstanding speakers. I'm off the audio merry go round but I can not provide you with any direct listening comments other than to communicate the fit, finish and build quality are beyond that normally found in our hobby. The sound quality is superb and they are never dissappointing.
Some have commented that bass response could be improved but I have to say I disagree....the bass is there, just not exaggerated or distorted with cabinet resonances. Go listen, expensive but worth it in my opinion. There are so many speaker manufacturers who are really just cabinet makers stuffing off the shelf drivers inside and then sprinkling mojo dust on their "landmark speaker". Wilson Benesch speakers are expensive to make....aluminum skeleton and carbon fiber skin is not off the shelf....nor are their drivers. They benefit from good amplification and reasonable current/power output....nothing crazy, just reasonable. Anyway, no substitute for a listen or a home demo, good luck.