Compromise? Can't find that word anywhere!I looked at the TS parameters of the 12 at one point, ages ago... forget the details, but my impression was that it needed a pretty large box to work well, and that the 10 was a better overall compromise.
Recomended up to 5.5 cu.ft (158 liter). We can do that...
I asked about this because when Dirac Unison (DRC) will be introduced, it wil be able to use all the speakers in the set to actively produce "counter sounds" against issues from other speakers. So it will work best with full range speakers. Maybe 20 Hz is a bit far fetched, but effortless down to 40 Hz would be my goal.
The 12 seems to have only slightly lower Resonance of 47 vs 49 Hz but it is 3 dB more sensitive which I presume would help down under.
Anyway, I have most of the parts for 4 big (though not 158 liter...) Atmos speakers with the 10 CX so it will heave to do. Going with passive radiators again, as my test stereo set worked out fantastic.