What Is The Difference Between Grendel And Beowulf

In the story of Grendel written by John Gardener, Grendel seems to be a different person then in the book titled "Beowulf". In the first paragraph of Grendel he talks about his mom and how he doesn't understand why they have to live in such a horrible place but his mimes doesn't care. Grendel gives us the description in the first paragraph that his mom is Pale, fat, and has some human in her. This seems to be the first indicator about how Grendel feels about his mother. In Beowulf I always assumed the Grendel looks up to her, because of the background information given, like when his mom goes to seek revenge on Beowulf. The two story's show two different sides of Grendel and how he sees the world around him.

The third paragraph is where I see the most different text from Beowulf and the story of Grendel. The third paragraph immediately starts of with the phrase "I am no stranger here. Respected guest.". This phrase imminently was brought to my attention because in the story of Beowulf, Grendel is known as a monster and no friend. So when I read the line "Eleven years now and going on twelve..." it surprised me on how different the story is.
This creating the biggest difference in both stories. He says that he enjoys hanging out with the Danes because they make him laugh and he is able to enjoy himself. At the end of the story it shows that Grendel has been eating humans and even uses the phrase "I silently sack up my dead and withdraw to the woods.". This quote/phrase is the only thing I see similar through both stories. All in all both stories seem to be completely different but yet at the end come