You can run MT's daily, but why would you? Sure they'll get a 1-1.5db higher score on a meter, but the XXX will sound better 100% of the time, which I consider MUCH more important for a DD than an extra db at the top end. Unless you listen to your stereo at absolute 100% full volume all the time, the output differences wont even be noticed but the SQ differences will be noticeable between the two subs all the time.
Everyone wants the biggest baddest woofer, even if its not the best choice for their situation. Even in today's world of some awesome SQL woofers, people still want more output for a daily. I dont get that reasoning.