I'm listening to Pristine Space at the moment... I'm using my very own true stereo convolution files and I have it patched for true stereo.
It's on a bus I named guitar.
I made the bus so I could insert Pristine Space there.
I took a guitar track and panned it hard LEFT.
I am sending it to the guitar bus with Pristine Space.
I listen to the 100% wet out put of Pristine Space and I have a "reverb" of the guitar in both speakers.
I listen to the 100% dry out put of Pristine Space and the guitar is only in the LEFT speaker... a condition I confirmed by powering off the left speaker.
That's what I meant before... that's what I just checked and confirmed.
I am not sure how it applies to the OP question... but I think it describes what one should expect from a True Stereo reverb effect.
I didn't buy Breverb so I can't comment about it.
best regards,
mike