Alright, that's fair, I gotta admit the Dark Knight trilogy really is on another level when it comes to superhero movies.
But thing about the Dark Knight trilogy is that it's self-contained.
I'll say the Dark Knight trilogy at least matches the MCU.
But if it's DCEU vs. MCU? I'm going to choose the consistency of Marvel over the horribly mixed bag DC has produced so far. They've just begun to find their footing about 7 movies in, which is far too long for a cinematic universe in my opinion. At this point they've also squandered some of their best characters, such as Superman and Lex Luthor among others.
The MCU is remarkable in that it managed to make society as a whole care about formerly B-tier superheroes like Captain America, Thor, and Iron Man. Before the MCU it was all about the X-Men, Spiderman, and the Hulk with a side of Fantastic Four. The MCU completely changed that and it's important to note that accomplishment.