It's a fight against the two then although the only reason why I feel Manchester united would be having an upper hand in the race would be because of the influence of the present coach as he was the former coach of the striker and would have more leverage in convincing him to come play and help united in their quest to refurbish the old glory of the Manchester united we know.
At the moment Manchester United should have more luck when meeting Manchester City who in their last ten games have only managed to win one match when hosting Nottingham Forest. So Manchester United can take more steps to make more surprises through their new manager's breakthroughs this weekend when they play as guests at Manchester City's home later. Because Manchester City are in a less than good condition so the level of luck for the match should be more potential for Manchester United to get this weekend.