Here's why:
* Contrasting Personalities: Holmes is brilliant, logical, and observant, while Roylott is cunning, secretive, and driven by greed and revenge.
* Different Methods: Holmes uses deduction and scientific reasoning to solve the mystery, while Roylott employs brute force, poison, and manipulation.
* Motivation: Holmes is driven by justice and truth, while Roylott is fueled by a desire for wealth and a twisted sense of revenge.
The contrast between Holmes and Roylott creates a compelling dynamic in the story. Holmes's intellectual prowess and deductive abilities are challenged by Roylott's cunning and violent tendencies, leading to a thrilling clash of wits.