The question of who is smarter between Sherlock Holmes and Hercule Poirot is largely subjective and depends on how one defines "smart." 

Sherlock Holmes, created by Arthur Conan Doyle, is often depicted as a brilliant detective known for his exceptional observational skills, logical reasoning, and ability to deduce conclusions from seemingly insignificant clues. His methods often rely on empirical evidence and scientific reasoning.

Hercule Poirot, created by Agatha Christie, is characterized by his meticulous attention to detail and his psychological insights into human behavior. He employs a unique method of "little grey cells," emphasizing the importance of understanding people's motives and emotions, which helps him solve complex mysteries.

While Holmes may be seen as more analytically oriented and scientific, Poirot excels in understanding human psychology and the intricacies of character. Their styles and approaches are different, so the answer may depend on personal preference regarding detective techniques and intelligence. Ultimately, both characters are iconic and represent different aspects of intelligence in detective fiction.
