Blatter made clear he preferred the Argentine over the former Manchester United ace.
Blatter's comments came during a question and answer session at Oxford University on Friday where he was asked about Messi and Ronaldo.
Blatter started off by heaping praise on Messi, saying: "They are both exceptional players but they are totally different and football is about the difference of styles, because Lionel Messi is a good boy who every mother and father would like to have at home.
"He's a good man, he's very fast, he's not exuberant, he's playing well, he's dancing, he's a kind man, he's a good boy.
"And that's what makes him so popular and naturally he will always get a lot of goals because he is this nice man, and he plays well and scores goals."
Then, when appearing to talk about Ronaldo, Blatter said "the other one, this is something else. The other one is like a commander on the field of play," before the FIFA chief stood up from his chair and walked across the podium in comic fashion.
Blatter continued: "But this is the other side of football and that's good to have such commanders on the field also. Because you don't have the same attitude, and that gives life to football and one has more expenses for the hairdresser than the other, but that doesn't matter...
"So I cannot say who is the best. The list (Ballon d'Or) will be published on Tuesday, and then the public will make the choice.
"I like both of them, but I prefer Messi."
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