By their performance they both stand potential chances of becoming the champions by the end of the season, moreover these two teams are playing in two competitive leagues, Leverkusen in their domestic league is currently trying to change a narrative which has promoted a good competition in their league as at this time, with Liverpool is also similar case and if you examine the squad dept both team are not equal but then they are both doing great, until they meet in the Europa head on and one wins the other I will not assume one to be better than the other.
Leverkusen is extraordinary in this season, they haven't lose any single match in their domestic league. In Bundesliga there are top teams like Bayern Munich, Borussia Dortmund, and Leipzig, I don't think those are easy teams to beat.
Liverpool, everyone know who are them, but they've lose one match in their domestic league.
So which one is better? obviously Leverkusen.
Talking about the performance of the two clubs between Leverkusen and Liverpool, I will not compare through the domestic league, but I will say about the fact performance in the UEL that both clubs have their own advantages, but they are still superior to Leverkusen, whose consistent strength is very large and has defense who are much stronger only conceded 3 goals while Liverpool conceded 7 goals since the group stage and Leverkusen have never been defeated while Liverpool have suffered 2 defeats.
From these several opinions it is clear that Leverkusen is very superior to Liverpool and its performance in the domestic league makes us even more confident that Leverkusen will be able to get title at UEL and I really hope that this club can achieve the target that Xabi is dreaming of, namely lifting the UEL trophy and get title in the Bundesliga.