Actually, as mentioned in that thread (reply #2) the direct comparisons between the NX-Otica and NX-MTM were done at my place, ina say medium room (18x12) and both speakers were paired with the same set of duals... we never did have the MTM's up at Don's place.
I'm not trying to bash the MTM's , they are also a great speaker and again, as I mention in that post, we really liked them with the duals in my room until we went back to the full NX-Otica. We tried multiple times with multiple sub tweaks, placement but we could never get them to sound as good as the full NX-Otica/dual sub combo. Crossover parts were similar, Sonicaps with platinum/Jupiter bypass, the full Otica's had the standard inductors, the MTM's we tried Gortz and Jensen paper./wax foil inductors
IMO , taking the workload off the NQ's is a good thing, instead of sending them a full signal from say 1350 and down you end up not sending them those 3+ lowest octaves and let them focus only on the midrange and you end up with the 4 M165's handling those lower frequencies which do provide a lot of punch/snap in that say 80-200 hz range.
Now, the one thing we did not try was high passing the amps fo the NX-MTM's and rolling off the MTM's with a high pass cap (line level) and then have the duals play up a bit higher to coverr what's been rolled off. IIRC, Mike is doing this with his system and it may make a big didfference
jay