The Aura MR12 actually came on loan from Aura Sound. We are a dealer for them and just helped by arranging for them to send it out for the test.
Same thing with the Oz drivers, both of the Oz subs came on loan directly from Oz Audio.
It actually surprised me how receptive the different manufacturers were to this comparison. I figured most of them would just blow me off, but it was quite the opposite. Almost all of them were very enthusiastic about it.