Inter Milan aren't really an attacking team, of course they have their own way of approaching games and getting goals, but they are not the kind of team that holds possession and attacks constantly, they do not have the necessary quality in their squad to do that. Having said that, there's no doubt that Inter would park the bus against City, even most of the best clubs in the world would do that, when you come up against City you have to respect them and accept the fact that they would control most aspects of the game, Inter have to do one thing, defend and wait to hurt City on the counter.
It all depends on the game or rather if Inter Milan can score early it is very likely that they can apply defensive strategy options but if that doesn't come true then it is likely that Inter Milan will play more aggressively in balancing the game from Manchester city. From this it can be seen when they beat Ac milan where the tempo of Inter milan game in the second half was more inclined to defend and this option was not very good if they did that against Manchester city.
I predict Inter Milan game will be more aggressive than before because the opponent they are facing is not a weak team, therefore the attack system must be Simone Inzaghi mainstay for the final match later.
If that's the approach Inter Milan is taking, it won't benefit them at all to score once and play a defensive game; if you watch the game between Manchester City and Madrid in the second leg, Madrid tried to play a defensive game but the goals kept coming I hope Milan doesn't end up meeting that faith as will score goals no matter how they defend.
Since they will be desperate to score, they will undoubtedly be aggressive, but Manchester City will always find a way to resolve conflicts that is just who they are. Good luck with inter milan stopping Manchester City attacks I know other clubs are gradually rising I am confident that, manchester city will not always be the star.