Mancini dismissed Soriano's football knowledge, despite his time as Barcelona's general manager and vice-president, pointing out he worked for airline Spanair before being hired by City.
He suspects Soriano was behind his sacking and made a point of praising owner Sheikh Mansour and chairman Khaldoon Al Mubarak.
"Soriano?" he said. "For him I was too big within the club. A manager in full control, loved by the fans still today.
"He judged a person and a context without knowing anything about the people he should have dealt with.
"I never thought of him as an interesting person from a football perspective. We never spoke the same language. And I'm not talking about Italian, Spanish or English.
"His past at Barcelona? I think he was coming from an airline. I've been in football since I was 13 and I had never heard anything about Soriano.
"He arrived in England with his manager role and I saw that he loves to speak, to get media exposure."