Caballero described Hart as being a 'robot' in respect to his training and preparation habits and feels he has the qualities to be a big hit in Italy.
"Hart is an absolute professional, total and complete," Caballero told Tuttosport.
"He has a dedication to his work that is uncommon - he's like a robot. He never holds back, not even for a second.
"This is a player who knows how to make his presence felt. He has a strong personality on the pitch and is a real leader.
"In recent weeks it became clear he wouldn't be in the City squad, yet he never stopped working to keep the team together, to be one of us.
"He's world-class and has everything it takes to do well in Serie A."