"You could create an excel sheet..."
of course, that is not the problem. each subwoofer set can be typically distinguished further down to each sub's uniqueness, so the number of subwoofer variables would become unmanageable.
a spreadsheet would have to consider every possible difference and that just gets ridiculous. for broad categories such as sealed, ported, or horn, just ctrl+f and highlight the builds that include those terms.
i think most of the value of the list is to help folks get a broad survey of what folks are doing in subwoofer land and then they can ask questions about their particular builds in the forum.