Both team have their own weaknesses, but both teams are strong enough to fight till the end of 90mins to see who will take advantage of the other and win the match. I will not place my bet on such match, because the outcome is unpredictable for now. Maybe the match day is drawing closer, there might be a problem in one of the teams that can make the match predictable.
Real Madrid should be able to win City because they can strike from anywhere, and anybody can score the goal. Their goal scoring is not relied on only some particular players, which gives them more advantage in the match.
if you believe Man City will qualify for the semi finals, maybe you would be better off betting on the second leg, but if you believe Real Madrid, maybe you will definitely bet on the first leg, but if you look at my predictions, it looks like you are a little more confident if Man City will qualify.
but personally, as a Real Madrid fan, I will bet on the first leg even though last season Madrid only got bad results, but this time I believe that Ancelotti already knows the right strategy to break into Man City goal.
It may be very high risk but there is no harm in betting a small amount to support your favorite team or also make a profit if Madrid wins.
BTW, actually it is very difficult to predict because these two teams have almost the same performance in terms of attack and defense, it's just that my confidence in Real Madrid is still very large.