There are also differences in squad quality. Borussia Dortmund has a stronger squad. Lille has a more modest squad. When this is the case, Borussia Dortmund is automatically the favorite. The team that will probably win the matches and advance to the next round will be the German team. They have been doing well recently and their performances have been on the rise. I think they will continue this rise with Lille.
I think that Dortmund as the finalists of the last Champions League are in any case considered favorites in these matches with Lille, especially since Kovac has changed the team for the better and at least they are quite capable of beating Lille and reaching the quarterfinals. Lille is too inconsistent and their defense is playing much worse now, they can lose to a weaker opponent in Ligue 1, so despite the fact that Dortmund is not having the best season in the Bundesliga, I think they are capable of beating Lille.