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For compression drivers with small, light moving mass no, it doesn't really matter. As driver size and moving mass goes up then series connection means both drivers are built out from the very low driving impedance of the amp by an 8 ohm ( or what ever impedance driver ) voice coil thus reducing damping. The more power you want to transfer to a large, high power driver particularly at lower frequencies the more low series impedance you want that path to be. This is a big part of why each driver in  dual driver subs are often  brought out on separate connector pins.