Those are two very different woofers. The N2 is a spl based sub with a very stiff suspension, higher Fs, and a very strong motor. The XXX is a low-end monster, and will require a larger box than the N2 due to the XXX's large Vas and higher Qts values. If you want to bang the lows like a madman, get the XXX. If you're just wanting to be loud, get the N2.