The speakers, not to be contrary, are voiced, VERY differently, the cabinets are shaped in a very different manner, lending to the exceptional imaging of the LSA's.
I worked with Von Schwiekert, for a while, as President Emeritus, helping with a CES, forming a contortium for Mr. Von Schweikert, for the 2005 CES--and while I admire his skills at design, certainly, I'm not a fan of the 'voicing' of the Von Schweikerts, when compared to the LSA's.
When I designed the LSA's I went for a completely different sound/mid tweeter blend, than most louspeakers present. For a small bookshelf, the LSA1's are VERY dynamic in the midrange, and have superior imaging and soundstaging, partly because of cabinet shape...all of this makes for what I think is a vastly superior sound.
Perfect Vision's Chris Martens just reviewed the LSA's Home Theater Package--you may want to read that review.
Good luck and good hunting.
Larry Staples
LSA Group
Founder/Designer