Well the major thing about ported is you can tune it to a certain frequency, and get more SPL, or better lows out of it, whereas a sealed isn't going to have those advantages. As well, sealed usually seems to "Punch" a little bit harder (As there's air cushioning the back of it) and is a little more crisp. IF you're into alot of rock, metal, etc, sealed will definitely seam cleaner, although ported can be made louder.