It was clear to me after listening to a few sealed speakers. Listened to a few sealed ATC'S and the difference was quite profound but in the end settled for KLH. That's about much science I applied .... Well, just using my ears. None ported speakers I concluded are much better suited for different room types as suppose ported ones.
If space is not a problem then ported may just seem the preferred Choice, but unless you compare but topologies in your listening environment you may never know.