I have not personally heard any of the Axiom offerings, I only know Bryston Middle T's and Model T's.
Both are extremely similar in performance in terms of sound quality. The difference is sound pressure in the room. The Model T's just hit you in the chest; but sound just like the Middle Ts; again, in my room.

In a smaller space, I am sure the 6.5 inch drivers in the Axiom would do just fine. Again, larger dynamic power as in the T's might be far too much.