What are some similarities and differences between "Adventure of The Speckled Band" The book and "The Speckled Band" the movie?

Sorry I only got differences

In which two ways does the film The Speckled Band differ from Sir Arthur Conan Doyle's original story "The Adventure of the Speckled Band"? The original story begins with Helen arriving at the apartment shared by Holmes and Watson, whereas the film begins with the scene of Helen's sister's death.

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