I have tested both, the Aq out performed in all aspects. Dont flame, I am just giving a honest opinion.
Its More efficient, priced better, I dont know Jacob on that level, I hear his service is exellent, I do know DJ, and have never dealt with a more accomodating manufacturer. I have torture tested it for failure and its bulletproof. Power output on 14.7 its all aq, I have not tested at higher voltages, but hear that the SAZ comes alive at higher voltages, Im sure the AQ would as well. Enjoy whatever you pick, Call both guys, and get some questions awnswered, and then make a informed decesion based upon your needs.