The Catalan boss condemned the behaviour of the Portuguese, insisting that he has nothing in common with the former Chelsea trainer, except for their mutual lust for victory
Mourinho said on Friday that although Guardiola had been "intelligent" and created a "better image" for himself, the two coaches actually have very much more in common than meets the eye.
But the Barca boss was keen to distance himself from a comparison with the Madrid coach on Saturday - at least in terms of behaviour.
"I know Mourinho has commented that in the end we are alike in more ways than it seems. Yes, we are alike in that the two of us want to win, there's no doubt," the 41-year-old told reporters at a press conference ahead of Sunday's Primera Division clash against Racing Santander.
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"But if in the other [sense] I have behaved like him, then I will have to revise my behaviour.
"We [Barcelona] have always been honest [and] that's why I don't have the feeling we are so alike. I have never wished to go the levels he has."
And Guardiola believes Mourinho's conduct in the press room is very different from his own.
"There are images and words during this time which speak a thousand words. There are thousands of press conferences you can look at," he explained.
"We both want to win, but we are different. But if it said that we are alike, then I will have a better look. My only objective is not to let my institution or my players down.
"Perhaps in some press conferences I have embarrassed the club on occasions, but I try to ensure that people [at the club and fans] are not ashamed of me."
Barcelona are currently 10 points behind Madrid in the race for the Primera Division title.