I've even made the claim that if you could show me that the situation was really reversed, that the Qu'ran had better evidence, my faith would be in trouble.
Of course, there are many more gods, and more holy books. Do you know of any that would do better than either the Bible or the Qu'ran on these three tests?
So let's take Outsider Tester Joe, someone who has, hypothetically, put all religions, prior to investigation at the same level of epistemic probability. Joe takes each religion's holy books, and runs the three tests on each. The Christian Bible wins by a considerable margin, so Outsider Tester Joe either becomes or remains a Christian. He can only be thought to have failed to employ the OTF if he has treated similar cases differently because he is a Christian insider. But the cases are not similar. There's an evidential difference.
In any event, John, you should either show, specifically, how the comparison site I have referred to somehow uses methodological naturalism with respect to Islam but rejects in with respect to Christianity, thus employing a double standard, or abandon the claim you make in your book that Christian apologists appeal to methodological naturalism in response to other religions.
I should further emphasize that I don't necessarily buy all the arguments in support of the Bible on that site. That's not the point. The point is that it is hard to doubt that the Bible is far stronger than the Qu'ran in the three categories on which it tests the two holy books.
Put up or shut up.