In terms of strength, I think Bayern Munich and Leverkusen are quite equal now and the most decisive thing will be the consistency of both teams until the end of the season, especially since this season's journey is still very long so anything is still possible.
I think the competition in the Bundesliga this season will be much fiercer than last season and Bayern Munich and Leverkusen still have the same percentage to win the title, apart from Leverkusen who is currently 7 points behind Bayern Munich who is at the top of the standings.
The strength of the team is very dependent on the quality of the players and coaches and in this case both have their own advantages because as far as we have observed Bayern Munich is still the best in the Bundesliga even though in the DFB Pokal they lost to Leverkusen. I also see a difference between the two clubs this season and their strength in terms of players is superior to Bayern Munich compared to Leverkusen. The competition is still quite open because there are still many matches left to be played, but the consistency of both will be tested to what extent they are able to maintain it.
In addition to Bayern Munich and Leverkusen, we also cannot miss Frankfurt who is the mediator of the competition between the two teams. Frankfurt will likely appear more consistent considering their schedule is not included in the Champions League. So this season Frankfurt can focus on maximizing their chances in the Bundesliga. Occupying 2nd position with a small difference from Leverkusen requires Frankfurt to be able to create distance.