I must say that I'm not implying that I know more about these systems than Gary....he forgot more than I'll ever know about PA systems.
Plus, he's older....er...more experienced.

All I can do is relate my own experience with each Bose system, and my own years of playing through conventional speakers (in stereo).
I strongly urge that anyone considering two Compacts, to try them out first.
Two of these things ain't cheap, and maybe one will do the trick.
I know, for my own satisfaction, I'll be buying two when the time comes.