As far as Epi and berg are concerned, the fEARful will go lower, clearer and be much louder per pound. A fEARful 12/6 will outperfrom most 210s, let alone a 112./QUOTE]A 12/6 side by side with my IP112ER didn't even come close to be as loud or bass-powerful. The cab was fed with a Streamliner head that delivers ample amounts of power. No reason for a 12/6 to be louder than any other similarly sized 112.
I have owned toooo many 12s (including Epi, Mesa, EA etc etc) and the 12/6 I have heard goes far louder and lower. I believe you heard what you heard, but there is a very good reason why a 12/6 "should" go louder than a conventional 12: it has more displacement: the sucker can just plain push more air (if powered to capacity), period. You are the 1st and only person I have ever read a post from who has heard a fEARful and believes it doesn't go louder than other cabs with the same size and number of drivers if it is fully powered..