Seahawks vs. 49ers: The Trilogy.

That’s what some are calling Sunday’s NFC Championship game (3:30 p.m., FOX). Granted, it’s the third meeting between the Hawks and Niners this season, but this rivalry goes back to 2007, when Pete Carroll was coaching at USC and Jim Harbaugh was coaching Stanford. Stanford upset the Trojans that day, and two years later the Cardinal did it again. The 2009 game featured the now-famous post-game meeting when Carroll, apparently upset that Harbaugh attempted a two-point conversation late in the game with a healthy lead.

Carroll asked Harbaugh: “What’s your deal?”

Harbaugh came back with: “What’s your deal?”

Here’s the deal. These coaches, and these teams,  don’t like each other.

There are those who believe that Manning vs. Brady is the greatest rivalry in the NFL. It dates back to when Peyton Manning was slinging passes for the Indianapolis Colts and Tom Brady and the New England Patriots were the toast of football. Manning, now with the Broncos, will take another shot at Brady and the Patriots in the AFC Championship game on Sunday (noon, CBS). By the way, Brady’s won 10 of 14 career meetings against Manning.

I think the Seahawks-49ers rivalry has eclipsed the Manning-Brady rivalry. Maybe it’s just because we’re so close to it, but these two West Coast rivals have forged perhaps the greatest rivalry in all of professional sports. The survivor of this game will be a lot like the cowboy who manages to hang on for eight seconds against the biggest, toughest, most physical bull in the world.

The teams are similar in makeup, featuring the most complete and feared defenses in football. The Seahawks have the best defensive backfield, and they’re deep and talented in the other spots, too. The Niners are loaded along the defensive line, and like Seattle, don’t have any weaknesses on that side of the ball.

Knowing the defenses are so sound, the offenses don’t ask a lot out of young quarterbacks Russell Wilson and Colin Kaepernick, although both have been electrifying at times.

The Seahawks ram Marshawn Lynch behind a pretty good offensive line; the 49ers have Frank Gore, and perhaps the best offensive line in football.

The Seahawks have Percy Harvin, providing he’s cleared after sustaining a concussion late in the first half of the win over the Saints on Saturday. We’ve only seem a glimpse of the guy, but it’s pretty clear that Harvin is a rare talent, and opens things up for the Seahawks on offense. The rest of the receivers are sure-handed and have shown an ability to make big plays when they get open,. The 49ers have Anquan Boldin, who is as clutch as they come, Michael Crabtree and tight end Vernon Davis. As good as Seattle’s secondary is, these receivers will be tough to stop.

It’ll be interesting if any bulletin board material shows up during the week.

Seattle cornerback Richard Sherman, who played for Harbaugh at Stanford, called his ex-coach a bully and said he was part of the reason why he dropped to the fifth-round in the NFL draft. Cornerback Brandon Browner said he wanted to “put his hands around Harbaugh’s neck.”

San Francisco running back Anthony Dixon, in a tweet before the Week 2 game, which turned out to be a 29-3 Seattle victory, tweeted: “Extra weight on the racks all week getting less sleep preparing for these She-Hawks,” he wrote. “I love hostile environments Imma feel right at home.”

Seattle linebacker K.J. Wright responded: “lol the she hawks!! I’ll be sure relay the message to the fellas. Its gone be a long night for you and the forty whiners.”

Dixon and Wright both deleted their tweets.

After San Francisco beat Carolina 23-10 to earn a shot at the Seahawks, Seattle receiver Doug Baldwin tweeted: “Wouldn’t want it any other way.”

Pete Carroll talked about the game on his ESPN 710 Seattle radio show Monday morning.

“I think it’s the matchup that everybody wanted like to see,” Carroll said. “We don’t mind it one bit and they don’t mind it, either. It’ll be a great one.

“These are the two teams everyone was talking about early in the year, so it’s interesting how accurate all the (soothsayers) were. There’s not a better matchup you could find right now in the NFC. We’re thrilled about it.”

The 49ers are peaking. They’ll bring an eight-game winning streak to CenturyLink. One of those wins was a 19-17 victory over the Hawks last month in San Francisco.

Nevada oddsmakers favor the Seahawks by three points. In other words, the bookies give Seattle the edge because of the home-field environment. As electric as the 12s have been in the past, you know it’ll be even louder and more boisterous on Sunday. That’s going to be tough for the 49ers to overcome.

This game might come down to the team that can control its emotions and be the most disciplined. Leave the smack-talk in the locker room. Now’s not the time to go all Jimmy Graham on the opposition. Keep your mouth shut and play. I don’t see the Seahawks or 49ers losing sight of that, not with what’s at stake.

Here’s something to chew on: The home team has won four straight int his series.

Here’s something else to chew on. Since Carroll and Harbaugh have been in the NFL, Harbaugh and the 49ers are 4-2 against the Seahawks, but they’ve been outscored 71-16 in their last games, both losses, at the Clink.

So here’s the deal: If you’re going to the game, bring some sani-wipes because this is going to be like sitting ringside at a  classic heavyweight championship  fight. Snot and sweat and blood are going to be flying.

And when Harbaugh and Carroll shake hands after the game, the winner, no doubt, will be tempted to say: “Hey, you know what the deal is? We’re going to the Super Bowl and you’re going home.”

Some links

Here’s another look at the Seahawks-49ers rivalry.

As I type this, 63% percent of the fans in this ESPN poll feel the Seahawks will beat the 49ers.

Are Seahawks trying to keep 49ers’ fans from buying tickets to Sunday’s championship game?

Scott Ostler of the San Francisco Chronicle writes that no team has an emotional leader like Jim Harbaugh.