Real Madrid has many advantages over Dortmund. Both in terms of player quality and squad depth. It's just that Dortmund surprised us all last season because they managed to reach the final last season, so this season we also can't underestimate them. And their good record this season is also a consideration that Dortmund might surprise us in the match against Real Madrid. But Real Madrid apart from having an advantage in terms of squad depth, we know that in this match Real Madrid will also have an advantage or home advantage.
Dortmund can still go all the way again to the finals and maybe they can win it this time after failing to win it the last time. Real Madrid mightn't make it to the finals, they don't have a strong team, the have strong players individually but together as a team, they're not united and this is going to cause them to not win games that they would have won if they had unity among eachother. Dortmund can win that game but it isn't going to be easy for them to win. Real Madrid have always won Dortmund when they play and in the last 5 games, Real Madrid have won 3 and draw 2. Dortmund will be coming for a payback and they'll want to win the game therefore the game will be interesting to watch.
Looking at their success last season in reaching the final, of course it is true that Dortmund has great potential to advance to the final again, but I think for now it is clear that it looks a bit difficult because however Dortmund inconsistency this season I think is quite severe, if Dortmund is still coached by Edin Terzic, of course Dortmund has a chance to surprise us again, But I think we all know that Nuri Sahin is not a coach who has better skills than Edin Terzic in facing big matches so far, indeed Dortmund is still undefeated in the UCL but we can see that the opponent they are facing is not a strong team, so indeed facing Madrid it is likely that they will get their first defeat later.