Listened to the mono's and the stereo Cherry at Barry's this past weekend. In that system, with the prototype Gallo signature speakers, the stereo Cherry was clearly the winner. While the mono's had plenty of oomph, the stereo Cherry had more finesse and texture. Perhaps because it has thousands of hours on it and the mono's are somewhat new? Maybe synergy with the speakers? Who knows.
Anyway, that was just my impression from what I heard.