there is a lengthy thread that has a good description of the difference made by fretlessboy (i think thats dennis' username?)
but after rehearsing and gigging with these models for the past several months myself: i can reinforce his opinions as well, since i haer the same things for hte most part:
My NeoX212 in comparison sounds more even toned in terms of mid/lows balance, and maybe because of that it can initially come off as more articulate, while still sounding full and meaty (it will transfer the properties of your head faithfully, so the cab will sound thick, smooth and full with lets say a LMII, but take on a more high mid, lean, tubey sound with a shuttle 6.0)
my friend's neox112 sounds thicker because of a bigger inherent bottom, and instead of the even sound of the 212t, the 112t sounds more thumpy and will hit you in the chest a bit better, especially when cranked in a smaller room, even with a shuttle 6.0, regardless of how you EQ a 212t to try to match the 11t, the 112t sounds more thumpy. the upper mid articulation might get a bit more buried within the thicker sound, but it is there to tweak if you want.
two of those will be more like a 1 + 1 = 3 sort of deal.
can someone tell me the sonic difference between a NEOX 212 and (2) 112s?
Thanks