I've had a few discussions with Floyd and Sean about the top end of the Salon2. They both agree that it's due to the curved, diffraction reducing cabinet. With the F328Be there is more that sense of the sound coming from the front of the speaker, where with the Salon2 the sound almost seems to "float."
After years and years of doing side by side level matched speaker listening sessions (sometimes blind, sometimes not), we've discovered that one design may not perfectly complement one recording vs. another. For example, Revel speakers tend to have a wide open, spacious sound. With the Salon2, that's taken to a whole other level. Strings in particular sound wide open and "silky." But brass and percussion sound more "diffuse." If we play the same recording on a JBL or a Perlisten, we lose some of that wide open silkiness BUT we gain more of a sense of realism for close mic'd brass and percussion (for example).
Still, the Salon2 has been the best "all around speaker" I've ever heard. The F328Be is terrific, has even better dynamics and "detail," but that openness at the top end isn't quite there.
In our demo system we can switch instantly between the Revel F328Be and the JBL SCL2, and depending on the recording, I may prefer one or the other. Same is true of the Perlisten S7t, though I can't do instantaneous level matched switching with them. Since I listen to a lot of orchestral music, the Perlisten is a hard sell for me because you end up with string sections that literally sound 3" wide. But clarity and detail are off the charts.