I'd echo Brian's comments - more power with the monos, but you lose a little sweetness, the monos being a little more incisive. Depends which is to your taste I guess, I wouldn't say one is not as good as the other. Also would depend on how your speakers are voiced too..
“Music has always been a matter of energy to me, a question of fuel. Sentimental people call it inspiration, but what they really mean is fuel. I have always needed fuel. I am a serious consumer. On some nights I still believe that a car with the gas needle on empty can run about fifty more miles if you have the right music very loud on the radio”
Hunter S Thompson