If you throw a pebble in a pond, what happens to the ripples? Ok, that is just and example, but it is similar with how the sub frequencies leave the sub. If your system is calibrated correctly, frequencies below around 80hz and below are non-directional, meaning you can't determine where they are coming from....also, a subs frequencies are verrrrry long.

Basically, if there is any difference, it will most likely be non audible to the user.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85