In the final matches it is not very useful to make predictions based on the statistics of the previous matches. Unexpected results can happen, unpredictable mistakes can be made. How the teams prepare for the final is very important, both the motivation and the psychology of the players come into play here.
Strategy is very important, it is essential to analyze the opposing team and go on the pitch with a style of play accordingly. So the fact that Inter conceded more goals in the first matches does not mean much in my opinion. We can only say that both teams have a lot of chances

The final match is very difficult to predict with data or what happened in one season, we just see or measure the overall strength between the two teams and then rely on instinct to determine the bet.
In terms of percentage, I think Inter and PSG have the same percentage to win the title because the overall quality of the two teams does not have a significant difference and in the final match all moments are possible to happen, whether it is luck on one team or vice versa so that both teams have the same percentage to win the title.