What are literature similarities between Beowulf and Sir Gawain and the Green Knight?

The classic literature pieces Beowulf
and Sir Gawain and the Green Knight were written centuries apart,
but have many similarities.  Both include tragic heroes with tragic flaws – pride or
hubris in this case.  The main characters’ journeys lead them each to learn much about
themselves.  Both include elements of bildungsroman, or a coming of age story as they
both deal with young warriors proving themselves as they grow up throughout the course
of the text.  Also, both titles include monsters that must be conquered, both physical
monsters and mental/ emotional monsters.