well, ive heard both the w7 and the mojo...id say w7 hands down.
our comp guys his high 160's with a single 13w7 on the audiocontrol without sweating and scores perfects in SQ comps.
the comp guy in my town with 2 15" mojos only hits high 140's low 150's...just one example.
personally i didnt like the way the mojo sounds at all, very pingy...the w7 sounds very natural and deep.