Favre told USA Today Sports that he hadn't watched the quarterback play much, but after he heard the comparisons, he watched three quarters of the Aggies' 41-38 win against Mississippi on Oct. 12. In that game, Manziel completed 31 of 39 passes for 346 yards and rushed for 124 yards and two touchdowns.
"I almost thought I was watching film of a young Brett Favre," he told the newspaper. "I didn't think I did a lot of things well [in college at Southern Miss], but he did. And I liked the attitude of 'whatever it takes.' From that standpoint, I liked him."
Manziel, who is listed at 6 feet, isn't as tall as Favre, who is 6-2, but his improvisational skills have drawn comparisons to Favre's style of play.
In a December 2012 interview with "The Dan Patrick Show" just days before he would be named the Heisman Trophy winner, Manziel said he thought he was comparable to Favre.
"If I had to throw a comparison out there too, Brett Favre -- what a guy he was and a true gunslinger," Manziel said. "If I was throwing the ball in the backyard, with my Green Bay Packers' No. 4 jersey on, when I was a kid, that's who I was trying to be like."
Manziel is widely considered as one of the top quarterbacks in this year's draft and was projected as the No. 1 overall pick to the Houston Texans earlier this month in ESPN Insider Mel Kiper's latest mock draft.
Favre told USA Today that he believes Manziel is already a better passer than he was when he entered the draft in 1991.
"I didn't throw near as well as him," Favre said. "He may have that capability -- unbelievable throws and can make plays with his feet. I was impressed."