well the only difference is getting a box and screwing it in, a custom box will sound a million times better and the 1300 bucks you spent on the jl you can get a tc axis which is a million times better sub, a custom box from pro-rabbit on here which will look much better, kerf port etc, painted to match car, recessed sub double baffle, and all prof installed for less lol
and then have a better and louder system