Hi Jay, auditioned the NCSE for over 2 weeks. The low end weighting and overall balance is subtly, but definitely sweeter IMHO compared to the LE IV. Experimented more and discovered a slight reposition of my C7-ES3's made further improvements in balance and wider soundstage. Never noticed this with the LE IV in the year+ I owned it and tweaked spkr position, cables, etc. The NCSE certainly brought more to the table than expected.
About halfway through the NCSE trial though, I also auditioned some separates that were stunning, and ended up keeping those instead.