Isn't "one of them got it wrong," an adequate answer?
It would be a perfectly adequate answer—if there was a legitimate question requiring such an answer. I am saying it is entirely unnecessary. There is no basis for anyone to bring such gratuitous skepticism about the reliability of the accounts, which (as I said, and anyone can easily acknowledge) would never be questioned if such differences were found anywhere other than in the Bible.
I regard myself as a skeptical person—more skeptical than many here (and far more so than most unbelievers). I typically withhold my support for any proposition that anyone claims to be true about the Bible (or reality), until I can ascertain that the most cogent reasons for belief are on the side of those propositions. Where I count the evidence to be uncertain, I suspend judgment, and am content to live with uncertainties.
However, I extend to the biblical writers at least as much charity in my judgments as I would to other witnesses otherwise not known to be liars or incompetent. When someone says, "There is a contradiction between this-and-that passage," it amazes me how quickly many people will gullibly sign-on to such unsupportable and counterintuitive claims. For many, it seems only necessary for the presence of a difficulty to be suggested, and they are quick to say, "Yeah, by golly! There is a problem there!"
I am willing to acknowledge certain contradictions in the biblical records, as they stand today (e.g., How many stalls for chariot horses Solomon had—40,000, according to Kings; 4,000, according to Chronicles), but I am not willing to create contradictions and difficulties out of whole cloth.
Unfortunately. this is what too many people who style themselves "reasonable skeptics" do. They accept, without the slightest skepticism, the most gratuitous claims against the reliability of certain witnesses—so long as those witnesses wrote something in the Bible—and they never seem to ask themselves whether, if they were to encounter such differences in any other realm of testimony, they would find the slightest difficulty with them. Of course they would not.