Asked to compare the two clubs, Heinze told Onda Madrid: "Real is different from Manchester. At Madrid, people get along better, there's more openness.
"Manchester is a closed club and everything is about competition, which is the philosophy of the coach."
On playing in the Premiership, the Argentina international added: "They (England) play forcefully, but are very fair. Between the players there's much respect, the referees speak a lot with the players and that also helps.
"Here (Spain) you try to talk and they (referees) remain silent, or you get a card."