Only thing i find funny is that innovate XD wideband got #1 out of all the others, but http://www.innovatemotorsports.com did the testing. Sounds a bit bias to me but ehh, what isn't lol.
i've read a little on the Innovative, but not what the last paragraph has to say.
Makes me think if you don't know your engine type and your engine specifically, well enough to determine a bad sensor on your own, then I would say the last paragraph says all you need to know.