In a word, yes. I don't know about the body dimensions but significant factors are the tone holes and the neck.Is there that much difference between the Comm III horns and the Imperials? Adjustable thumb rest is a plus but they really screwed-up the neck tenon, imo. I don't think they sound much different............
I did a 'shoot out' with my '42 Handcraft Standard and '54 Committee 3 tenors and they do sound very much the same. I have a 1920 Martin tenor which does have different tonal qualities, however.