It always amazes me the extent to which brothers can differ. Just look at the Goering Brothers. Herman was a Nazi war criminal, whilst his brother Albert was a true humanitarian, who used his influence to save the lives of Jews during the holocaust.
This is not a one off example. Even today brothers can be polar opposites.
Dave Lee Travis, known by the initials DLT is a known sex offender. Whilst his brother Bacon, proved to be such a nice chap that he had a sandwich named after him.