Exactly. Holmes would be bemused at how Brown reaches the right conclusion through the (entirely!) wrong method; Brown would have dark forebodings at the future career of a man who makes logic his god and shuns human attachments. In Conan Doyle's universe, Brown would trip up; in Chesterton's, Holmes would be revealed as the killer. Authors do stack the odds against their anti-favourites, but Chesterton more than C-D. I think: but then I'm out of sympathy with GKC's values.