Inter Milan will have a difficult time deciding on a tactic to utilize against Manchester City. Manchester City, like every other team we know, has many strategies and will only use those that will benefit them throughout the game. Let Inter Milan not spend too much time looking for Man City's flaws, but instead use their own tactics to get an advantage over them in the first few minutes of the game.
The only weakness of Pep Guardiola's strategy is to play total defense and counterattack. This scenario may be implemented by Inter in their strategy in the final, but the level of success can always be doubted considering Manchester City's performance. So far Manchester City have waited quite a while to win their first Champions League title, so I think they have more determination this season to get there than Inter.
We can differentiate the strength of teams based on squad depth and also their performance so far. Inter tend to be unstable, but they also have a good squad, but Manchester City looks more ready to complete its mission this season. Just a few days from now Manchester City have an FA Cup final against Manchester United. So they will probably focus 100% there first before going to the Champions League final.