The former Real Madrid man knows all about playing at a club with plenty of big names and bigger paycheques and feels that Mancini would be struggling to keep everything under control in the dressing room.
"The most important thing I think for the manager is to try and control the changing room," he said.
"Sometimes it's more important what goes on off the pitch than what happens on the pitch.
"You have to control the group. You have to keep everyone happy. I think that is very difficult when you are dealing with big players. That is a big problem.
"The problem is, he has to settle all these new players into his team and when you sign eight new players every year, that is a problem," he added.
"Manchester City are under construction and they have had to start from the base.
"We just needed to buy one great player every year and bed him into what was already a good team.
"That was much easier than trying to buy eight players every year and making a winning team out of them."