Somewhere in my stash I had a book from many years ago when I worked at Radio Shack (When it WAS a cool place to shop).....Anyway, there are many mathematical equations based on technical info from your woofer or subwoofer manufacturer dictating exact optimum cabinet volume for any given speaker. They were usually VERY large numbers, so you could also equate smaller cabinet volumes and filter in port diameters and lengths to compensate for the smaller volumes. (Back then, most quality speaker crossover networks used light bulbs disguised as fuses as protection, beleive it or not. Light bulb filaments would not affect dynamic range where a fuse tended to muddy the mids/highs, and when replaced with fuses, an easy assumption, sound quality went to crap)
But enough telling how old I am..................

If I remember right, the important numbers were Resonate frequency the the Qe number.......been years guys.

Today, music is very different, and all people want is "do it bump?", not audial intregrity, So probably not important as it was in those days.
As it is, I agree, a sealed box "hits" harder, but takes a ton of power to do it, where a ported box is far more efficient at the same SPL. The quality of the bass coming out? Well, depends on what you listen to I guess.
Ray