A final grade is calculated based on subgrades or points, which serves as a suggestion for the assessor, who can choose to deviate from the suggestion.
If you have two teams that score close together, then it can happen that you do think like 'well, but this team did slightly better than the other, so they get slightly higher.' And sometimes it can happen that you're a bit in between categories. I think that in practice many do just copy the suggestion, but...