You can make dramatic changes from the first matchup to the second. For example, you might go into the first game thinking you can run the football, only to find out that you can't. So you take a different approach in the second tame and try to get points early through the air. Sometimes it works. Often it can backfire.
Fans sometimes expect the second game to follow the same script as the first.
The venue changes, but by and large, the matchups don't. So they expect a repeat. It won't necessarily happen. As an example, look at some of our scores from 1999. The difference in the number of points scored in those games was dramatic.