Madrid have more experience in the Champions League... I think they have had more difficult opponents than Dortmund... Man City and Bayern are not PSG and Atletico... Of course the final match is hard to predict, especially after Atalanta beat Leverkusen in the Europa League final... But it seems to me that Madrid should win... Dortmund have been excellent this season and it would be amazing to see them as champions, but I think it's unrealistic for them...
The point I can catch is that Real Madrid is more trusted as the final winner against Dortmund. You are trying to describe the situation of a final by comparing the Atalanta and Bayer Leverkusen matches in European League.
Right if the final match will feel different even though Real Madrid is known to be tough when playing in the final round. I think the chance to win is still 50:50 between Dortmund and Real Madrid.
Dortmund is very strong in terms of defense. Real Madrid is great in attacks with the number of goals made in UCL. That is, the two teams have advantages and disadvantages of each. For me, for now I don't have to win Real Madrid or Dortmund, but how strong is our analysis to win the bet we will make.