I really enjoy comparing the matrix and discrete versions of CBS quads, it's fascinating how sometimes the decoder does an excellent job and sometimes it struggles. I actually just picked up an SQ copy of Harold Melvin's Wake Up Everybody and was shocked how poorly it decoded, so I cued up the title track, available in discrete on AF's The Collection SACD (no Q8 release for this one), and realized why: on the discrete version, the rears start off nearly silent and appear to be used in a very subtle manner. Certainly not your typical uber-dry, uber-discrete CBS quad mix.
In the end, I find it's best to have both SQ and Q8 versions of a given title, if possible. Even if the Q8 sounds lousy, it's nice to have a discrete reference.
maybe its just the title track of "Wake Up Everybody" that's as subtle as that? i recall "Don't Leave Me This Way" and at least one other track being quite Quaddy, although with no discrete point of reference until/unless it ever gets done on SACD who knows how Quaddy the rest of the album really is!
edit: how Quaddy is "Tell The World How I Feel Abou'cha Baby" through your Tate?
that's another track off that SQ album i felt panned out pretty well through the Surround Master..