Perfect 12.1 or alpine r 12 - need help

im torn between a infinity kappa perfect 12.1 or a alpine type r 12.. im just getting one for right now. i know the kappa sub goes down to 18 hertz, while the alpine goes to 24, and then theres the db facts.. the kappa has 96db while alpine says its 87db.

they are on sale right now so there close in the pricing range. which should i get and why.. i really need help, i dont think i can go another sleepless night, going back n forth between these two..