Peyton could have shared with Eli how porous the Eagles secondary appeared to be. The Eagles are ranked 31st in the NFL against the pass, and when Peyton threw for 327 yards and four touchdowns last week, it did not help their standing.
The Eagles might be without starting safety Patrick Chung for the second straight week, too. Chung remained limited in practice with a shoulder injury, and the next two days will determine whether the team will activate him against the Giants.
The consistent message from the defensive players was that this is a different matchup from the Broncos, so last week's struggles do not necessarily translate to a poor performance on Sunday. Then again, the Eagles have been able to keep an opposing passer below 300 yards just once in four games.
"We're ironing everything out, and we're going to put on a better show," cornerback Bradley Fletcher said. "We have what it takes to get this job done Sunday."
The differences between the two offenses start with how the plays are called. Peyton Manning, who helped the Broncos to a 52-20 win over the Eagles, is known to call the plays at the line of scrimmage. Eli Manning runs Giants offensive coordinator Kevin Gilbride's system, although he can make changes at the line.
Kelly and defensive coordinator Bill Davis praised Eli's arm strength. The Giants have a vertical offense that has produced four passes over 50 yards this season, including three to Victor Cruz.
The Eagles secondary has been hurt underneath but seldom over the top this season. The players must ensure that the Giants receivers don't get behind them.
"I think that'll be one of the keys to success against these guys," cornerback Cary Williams said.
The record and statistics also reveal a marked difference between the brothers. Peyton's Broncos are 4-0, and Peyton is on a record-breaking pace with 16 touchdown passes and no interceptions. Eli's Giants are 0-4, and Eli has more interceptions (nine) than touchdown passes (six).
But Eli still has two Super Bowl rings.
"As far as smarts, they've got it," Williams said. "One has two Super Bowl rings, one another. I don't see much of a difference except for the interception totals. Besides that point, I think they're both great players."
Besides Eli's accuracy on the deep ball, what also impressed Kelly about him is his toughness in the pocket. Kelly said that Eli takes a hit, gets up, and returns to the huddle with the same demeanor.
The younger Manning has had enough time to show that on film this season. He has been sacked 14 times in four games. Last season, he was sacked 19 times in 16 games.
The reason has been an offensive line that has lost three expected starters. The Eagles must make sure they pressure Manning, although that hasn't been a strength of the defense this season. The Eagles have 10 sacks, tied for No. 18 in the NFL.
They have only two interceptions, and not a single one in the last three losses. Considering Manning's penchant for throwing them, the Eagles must find a way to create turnovers.
"We've got to get a pass rush," cornerback Brandon Boykin said. "Things we didn't do last week, getting sacks and turnovers, it all works together."