By FOX Sports Staff
City make the short trip to Old Trafford on Monday to face United in a derby match which has lost some significance given the 15 point gap between the two teams.
Sir Alex Ferguson's men are poised to take the title away from City with eight games still left to be played and Schmeichel is adamant the champions have suffered because of Mancini's volatile player management.
The Italian frequently criticised his players in the media for under-performing this season including having pops at skipper Vincent Kompany, England goalkeeper Joe Hart, and most recently France attacker Samir Nasri.
Schmeichel, who played for City in the latter stages of his illustrious career, thinks this was a mistake on Mancini's part.
"You will never see United manager Sir Alex Ferguson in the media taking problems he has, or the squad has, or the club has, into the open," Schmeichel told Sky Sports.
"Never ever. But you do see that at Manchester City.
"Some players have been heavily criticised by the manager in public. Perhaps Mancini brings that from Italy. Perhaps you do that there, where there are different expectations.
"But that does not work here. I can understand that some of the players have been angry or disappointed with that type of treatment. Sometimes they will take that on to the pitch and maybe not play 100 per cent for the manager.
"That never happens with Sir Alex Ferguson. Never. Sir Alex is so consistent with his management. He manages each person differently but you know exactly where you are with him. You know exactly what is required. Manchester City have not had that."
Schmeichel played for Ferguson from 1991 to 1999 and claims that the Scot has built an institution that fully understands what it takes to win.
"When you talk about Manchester City struggling to compete with Manchester United - and that's what it is, the gap is 15 points, so that's struggling - it's all about the whole football club," he said.
"What is the football club? Does everybody within the football club - in every single position - know what it takes to win? At Manchester United, everybody does know that. They all understand it."
He added: "If you take the title away from United like City did last season then you are going to feel the full fury of Sir Alex Ferguson."
"He will get into his players and make sure they bounce back and win it.
"Nobody expected this Premier League season to be as good for United as it has - 25 wins, that's totally unheard of, incredible.
"I remember when we lost the league on the last day at West Ham in 1995.
"All summer it was, "What do you want to do with your life? What do you want from your football? Are you big enough to bounce back?
"That was the theme in every single team meeting with Sir Alex. We did bounce back and the same thing has happened this season."
Schmeichel suited up for City in the 2002/03 season.