From what I remember when I was doing research before I bought dual rw12s, the pa150 will play louder, but the rw will extend lower. A user named archea tested dual rws and they extended down to about 24hz, awfully good for a $300 sub. During bass sweeps, I know my subs work well because when you get to the low stuff when it's below human hearing they rattle doors against the door frames, which I fixed with some rubber stickies. They are loud too, I have to keep them turned down so they don't overpower everything else
Wow, that is quite impressive!! Thanks for the info!