What are two similarities between Sherlock Holmes and Doctor Grimesby Roylott?

Answer 1

They both live in 221 B. They both solve mysteries. They both live with their best friend. They both only have one friend. Their best friend's last name starts with a "W." Both of their best friends are doctors. They both are considered eccentric.

Answer 2

both of them are men of science,both are physically strong,both are clever,both are criminals about the deeds of the snake