If you really want to put sub vs. sub, both boxes would have to be sealed. Otherwise you start taking into account install variables...which weren't necessarilly part of the equation. What was said was that brand x 10" sub could stomp a JL 13w7. Like I said, you could beat a Viper with a Honda...anything is possible. It all boils down to just how much money and time you want to throw at it in order to make it do what you want.