Thanks Dietz and mpower88. Of course MIR, as sophisticated as it seems to be, remains a reverb in concept and a user should treat its output accordingly, that is proceed to further enhance it by multi-compression/limiting/etc. which is what Vienna Suite is. Have I got this right, or is it a general concensus that MIR's output could possibly be bounced as final audio (save for some initial E.Q. on the instrument tracks)? I guess it was interesting for me to hear the same user's two mixes from the two different products.
Sadly, my current setup does not allow me to try MIR at this time, but since theoretically I'd be prepared to spend more money if that meant I could eschew the more elaborate mixing process for a more intuitive/natural alternative, it is interesting to know that MIR is a serious step in that direction.