RENTON, Wash. -- From 2007 through 2009, Pete Carroll's USC Trojans and Jim Harbaugh's Stanford Cardinal faced off three times, and Harbaugh emerged with a 2-1 advantage. Carroll has never had the upper hand on Harbaugh since the two coaches moved to the NFC West -- Carroll in 2010 with the Seattle Seahawks, and Harbaugh in 2011 with the San Francisco 49ers. Harbaugh's rebuild has been more decisive, and reflected better early results. He's holding a 33-6-1 regular-season record, and two wins in the playoffs, to Carroll's 23-23 mark and one playoff win. But when it comes to styles and schemes -- and styles make fights in football, just as they do in boxing -- the teams built by these two coaches are as similar as any you'll see in the NFL today. Both the 9-5 Seahawks and 10-3-1 49ers, who will tussle this Sunday night for control of the division, feature hallmarks that could be easily switched from franchise to franchise without too much trouble. Each team is currently sparked by a young quarterback making unexpected gains, each team is buttressed by a violent and consistent running game, and each team is truly defined by a defense that stops opposing offenses from front to back....