I know this is a reply to the original question which is a few months old already, but I thought I'd just share my experience with these two subwoofers.
I actually purchased and compared both of these subwoofers.
I'm not an audiophile but I recently upgraded my Onkyo HTIB front speakers to the Kef 100's and matching Kef Q200c center, and after reading many of the reviews in these forums decided to upgrade my subwoofer as well.
My living room is 15' x 19' and open to the kitchen and entry hallway. And in my setup the Speedwoofer sounded better than the PB-1000.
Over a period of three weeks I did two pairs of back to back comparisons between the PB-1000 and the Speedwoofer 10s. I first did the sub crawl with Audyssey turned off (using each subwoofer just to make sure) and found that the best position for the subwoofers was just to the right of my left front speaker. I then hooked up the PB-1000, did the Audyssey calibration, and listened to it for a week. It was a clear improvement over my previous subwoofer and I think I would have been happy with it.
I then hooked up the Speewoofer, ran the Audyssey calibration, and listened to if for a week. I noticed that the bass had more impact but I wasn't exactly sure if I liked it any better at first. I also noticed that it made my living room shake much more noticeably than the SVS.
During the last week I went back to the PB-1000 and listened to it for a few days, and then back to the Speedwoofer and listened to it for a few days. I did the Audyssey calibration with each switch.
After this last back to back the bass from the PB-1000 just seemed duller to me. I even ran the Audyssey calibration twice to make sure that wasn't affecting the performance of the PB.
In the Despicable Me movie (I have kids) there is the scene with the rocket launch and the Speedwoofer really made my room shake, but in order to get the same effect I had to turn the PB volume much higher. In the end I just liked how the Speedwoofer sounded better. The bass seemed more clear to me. And I liked that I could physically feel it more. It also sounded better with music to me, particularly during the last few days of testing.