The UEFA Champions League title comes with rising star and we know the exact port of these clubs. Manchester City and Real Madrid happen to be the only clubs to take leading positions in the UEFA Champions League because they've both capacity of strong actions. Nevertheless, these clubs coaches have absolute confidence when it comes to major tournaments, they always sort out means to push for elevated positions.
I agree that a finals between them would be a dream for anyone who likes watching football. Their styles are so different, both the teams and also the managers as well. One of them tries to keep the possession as much as they can and keeps passing back and forth constantly and just try to find an "in" to score all game long and their press is otherworldly when they don't have the possession just so they can win it back quickly. Whereas, the other is just direct football, get the ball, give it to attack, and go towards the defense, try to pass them if you can and then shoot, if failed? Try again later.
To be fair to these two teams they have faced each other a lot, and most usually whenever one of them beats the other, the winner goes on to win the UCL title as well. Because these are the two best teams in the world, that means when they win against each other, whoever they face later on ends up being a team much worse and easier to defeat as well.