I know theyr both SQsubs but wich will SLAM harder(both properly powerd to the MAX) JL12w7 or 15"AlpineTypeR?

(*all questions meaning a single sub vs. singke sub, not dual subs) Also same question but 13w7 vs. 15" Alpine type R? Which will give most SPL n compltly rattle my car? Lets just say both at 1,200watts Rms. Currently own the alpine n lookung for more bass and have a chance on a great f****n deal! Not sure if its the 12w7 or 13w7 from a co-worker for $450!!! He has no idea what he has lol! I think he must have looked up the w3 or w6 version online for price on accident.. I saw it n if its not blown (just think hes clueless wen it comes to car audio) its in near perfect condition. Someone help PLEASE!