Which comparison of Beowulf and Grendel is most accurate?

Beowulf and Grendel's most accurate comparison was that they were concern there environment. Beowulf was tasked to defend the people while Grendel was concern of protecting his only home which humans prevent themselves from entering. Their conflict caused the threat of each other's environment which they need to protect.

Beowulf is a hero. He is courageous. He thinks about the good of others, and he is loyal.

Grendel, on the other hand, is an anti-hero. He is coward when faced in real battle. He is selfish and he is only loyal to himself.