Sealed first. It uses less materials and somehow the physics I 'imagine' with such an arrangement appeals to me with the bass I am either looking for, or not trying to go beyond.
Something has occurred to me. It's daft, really, but with trying to understand why bass has done so well in here in the past is something odd, in an accidental sense. My listening area, it's adjacent hallway and the way it loops around, is in effect, a giant ported subwoofer enclosure. Tunable by opening and closing doors to other rooms, opening doors/ combined with a window or two, perhaps. A 1800 cu ft ported sub.