Consider the theme of the novella Shawshank Redemption and the novel The Green Mile when drafting your thesis statement. Both stories are about men who are outcasts from their society and through their special "talents," they are able to shape the world around them. Also, both stories share the theme of hope: Andy hopes that he will escape the prison and resume a normal life while Paul hopes that Mr. Coffey will be able to cure his friend's wife. Finally, both Andy and Coffey are accused of crimes for which they are not guilty, and both must suffer imprisonment because of their assumed guilt. So, any of these ideas might be a starting point for comparing/contrasting these two stories by Stephen King.