I second that emotion. Previously owned the Song3s with the RAAL ribbon. I find the upper and mids much more rounded with the Be tweeter than the RAAL. Most notably to my ears is that the treble edges are gone. Listening to Wake Up to Find Out (Grateful Dead at Nassau County Coliseum, 3/29/90) as I write this. As effortlessly as the BePure2s reproduce music, they manage to convey the energy and space of a live performance better than anything I have heard. Add in the extra bass extension with the Purifi woofers and Jim's unmatched artisanship with the cabinets and he has achieved the impossible: I have stopped buying hi-fi (is that still a term?) equipment.
Enjoy the music!