"It's special because it is a Manchester derby and it means what it means".
Mourinho rejected the opportunity to apply pressure to City before Sunday's derby.
German magazine Der Spiegel made a series of claims against City in an on-going series of articles based on documents purportedly attained from whistleblowers Football Leaks.
Guardiola has said City want to follow UEFA's FFP rules and Mourinho suggested the club's heavy backing of the former Barcelona head coach in the transfer market has moved them into a different league to United.
"It's a fantastic victory for us, a victory that is not just about the points we lost at home but the feeling of how well we played", said Mourinho.
"When I work for a club like Manchester United I need to forget my past as in those 90 minutes I represent Manchester United", Mourinho said. "They are a very good side, they play good football, they score a lot of goals in every game, but we also have our qualities which we have to use. But I don't think they think it is an easy match for them".
"If you want to put the match into the context of where we are and where we can be, it becomes even more hard".
"City's title celebrations had to be put on ice when United came from two-goals down to win 3-2 at the Etihad back in the spring, and I expect to see both sides find the back of the net in Sunday's Manchester derby", Owen told BetVictor. "But you are right, Manchester City is a very powerful team". "It was great. We know that it's a big team and, to be honest when they scored a goal we had nothing to lose".
"We have to just think about the match, it is hard enough by an isolated event".
"A team has good and bad moments and this moment they have confidence".
"If we keep conceding goals before the opponent, there will arrive the day where we can not come back", he said.
United came from one down to eventually secure all three points thanks to late goals from Juan Mata and a Alex Sandro own-goal.
United though had the final word as Mourinho brought on Mata and Marouane Fellaini, who helped turn the game round in just four minutes, the Spaniard bending in a free-kick from the edge of the box to give the visitors a scarcely-deserved equaliser. "Which, I have to say against Juventus, it happened".