In the beginning of "High Noon" will Cane gets married and will quit completely when he heard that frank miller is coming back, and gets told to leave and quit working as A Marshall.
In the beginning of "Tin Star" Will Kane (Duane) goes to the cemetery to see his wife that had died a long ago. I think that Carl Foreman changed this although he could make it more dramatic and make him want to leave.
In the movie "High Noon" Harvey and Will get in a fight at The stables and Will knocks him out however In the book "Tin Star" it is Harvey and will but they never get in a fight. I think that the screenplay writer Carl Foreman decided