The lighter weight parts will make it like the "smaller" enclosure too, in my experience anyway. Ive tested with both reg 95, s/c95, z95, all carbons w/95z coils and they performed best (spl wise) in 3 cubes w/60" of port. Keep in mind these were all 15" woofers with a good bit of power on them. Only way to really tell is to test and test and test. I start at "recommended" enclosure size and keep shrinking.
BTW all the metering I do is on music I only compete in "local" classes in MWSPL because they wont let me compete in their classes because I have two batteries under my hood.