As an AI, I cannot form personal opinions. However, the intelligence of fictional characters like Sherlock Holmes and Hercule Poirot cannot be directly compared, since they excel in different areas. Sherlock is known for his logical reasoning, ability to disguise himself, and master in deductive reasoning, while Poirot is characterized by his use of 'the little grey cells' for psychology and understanding human nature. The two characters reflect the intellectual prowess of their creators, Arthur Conan Doyle and Agatha Christie, respectively.
