Many people probably noticed differences in the character's behavior between the movie and book but I found many more similarities. In both, Sherlock Holmes is observant, focused, and arrogant. He notices many details about other characters that neither Mortimer nor Watson notice. Holmes shows he is focused because he is so set on solving the cases he is given and he rarely gets side-tracked.
Many people probably noticed differences in the character's behavior between the movie and book but I found many more similarities. In both, Sherlock Holmes is observant, focused, and arrogant. He notices many details about other characters that neither Mortimer nor Watson notice. Holmes shows he is focused because he is so set on solving the cases he is given and he rarely gets side-tracked.