Mono amps...

are they all basiclly bridged stereo amps or are some designed with a clean sheet of paper as mono amps? I am asking because I have had monoblocks for more than a decade and like the idea of isolating each channel and having the amps as close to the speakers as possible (in fact I miss stereo consoles...just kidding). Being in the market for Bryston 7B-STs, I asked whether they are, in fact, bridged 4B-STs and was assured they are not. Looking at a review of them, however, I read that they are, indeed, bridged 4Bs. Why I should be concerned about this is not clear even in my own mind. I know there are pros and cons to bridging. The slew rate is dsoubled, if I remember correctly. What it all means is a little more blurred. Any thoughts?