This is going to be close. It’s going to be hard-hitting. And for those who appreciate the top-level, hard-core competition the NFL has to offer, it should be a treat, the type of contest that could come down to one play. When the margin for error is that thin, the focus must be razor sharp and every little detail in preparation takes on added importance. Here is what it comes down to if you’re a Patriots follower: Given the toughness the team has shown in various situations over the course of the 2011 season, with the defining moment coming Nov. 13 in the Meadowlands against the New York Jets to snap a two-game losing streak with a short-handed roster, what’s not to like about your team in that kind of high-stakes game? There are no givens in the NFL, but one thing that has been close to a certainty this year is that the Patriots are going to give you their best shot and display a championship level of mental toughness. It’s one of their most admirable characteristics.