If this was written in a contemporary style, it would possibly be a lot of differences.
First the structure would be more well-balanced with longer sentence length and written in paragraphs to create more fluence. In Beowulf the sentences are more consist and right on point.
Another thing i believe is that the context would be more describing to explain the setting. For example you would know what the weather was like, how it smelled and the architecture would look like. It would contribute to a more richer story.