One of the things that makes writing styles distinctive is that the average person only uses about 1/4 to 1/3 of the words available in their language and this vocabulary varies from person to person to person.
So when one book of the Bible contains approximately 150 words that aren't found in any other book, it is definitely a distinctive writing style.
One can no doubt find ways to explain this discrepancy, but I would agree that dismissing what little evidence we have is not evidence in and of itself.