One of the neat things I get to do now as part of the media is access to opportunities that are not available to the general public. It is called "media availability" where you can witness practice, talk to players and quiz coaches.
In coaching or any position of leadership, understanding the "why" of a person's actions is critical to success. Simply knowing what a person is doing does not provide an opportunity to lead. Instead of being proactive, you are always reacting.
A good comparison of 3-4s around the league can start by comparing the defenses of Dom Capers with the Green Bay Packers and Wade Phillips of the Houston Texans.
New Orleans Saints fans were given a superb look at the modern 3-4 defense in Super Bowl XLVII since that is the base defense for both the San Francisco 49ers and the Baltimore Ravens. While both teams utilized 3-4 personnel, they were used in contrasting styles.