Well I haven't heard them side by side but i have heard them separately, I preferred the PSB, it was more neutral in it's tonal balance, it was very articulate and could separate musical information very distinctly.
The Ushers sounded slightly more exiting and the bass was a little fuller, treble was hotter. a little more exiting presentation but the midrange didn't seem as right as the PSB.
The Ushers sounded slightly more exiting and the bass was a little fuller, treble was hotter. a little more exiting presentation but the midrange didn't seem as right as the PSB.