Mourinho will try to win -in the one way he's had success with against Guardiola(come out strong, press high in bursts, sit deep and pack the middle for most of the game, looking for counterattacking chances). But he won't risk losing the game. Draw, and they live to fight another day. Lose, and it's top 4 race for them
As for Guardiola, it's all about managing the lead for city now. Avoid defeat and only a major meltdown would see them lose the title.
Guardiola will be more than happy with the draw, and mourinho will try to win but won't risk losing. Unless United score in one of their offensive bursts, the game will see city pass the ball horizontally in midfield for a good 60-70 minutes, with 10-20 minutes of united going for it and City looking to contain(first) and explot(if possible) the gaps
United scores early, and it could become a cracker for a good 30-40 minutes at least. That's the ideal scenario for the neutral
Personally i'm hoping for a 5-0 hammering but that's just not happening