I can't explain that. I'm not saying your E15 isn't a better subs. However, you make the E112 to be a poor performer, so much so, that if I was looking for a sub, based upon your statements, I would stay far away from one. I'm saying, based upon Gene's review, that they can't be that bad. To have so contrasting reports, logically speaking, set up and room must be the determining factor. I don't believe that E15 is a miracle sub, immune to room modes and placement, in other words, you can drop an E15 in a room and it can sound boomy and sloppy as well.
BTW, did you take any measurements of both sets of subs in your room?