depends on specs of the sub, but the general answer is yes. a ported box is more efficient, but less musical. it has a more peaky response around the resonant frequency of the box, as a well designed sealed box can have a flat response across the board.
Actually a Bandpass box is the loudest. not any of them prefab ones either.. just have to be very sure on sealin up the box or else it'll stress out your subs alot
while a bandpass is loud it also hides alot of distortion and bad signal which goes hand in hand with blowing subs not saying that a bandpass will blow your subs but you can get the same volumn out of a ported box built to the right spec and tuned to the right freq. for the sub