Difference is (have read MHA, not read JJK, so idk if they do the following) is Black Bolt has no control over it, which is quite cool. Literally cannot say anything or make a sound because it will fuck things up. He can't turn it off, only control and hone himself so that he never makes any noise. If anyone remembers that trash Inhumans tv show, I recall they had a moment where he gets hit by a baton and grunts, and that grunt trashes a car that he's facing.
No Way Home was fun when I watched it a week or two ago. If you remember the Garfield series, they were clearly building up to a Sinister Six film at some point. This one they just went and did it. Didn't have to come up with new actors or rehash the backstories, these guys are all established in their respective movie, just bring them all in, bring the other two spidermen in, and just have fun with it. They also made sure to give MCU Peter a shit, tragic deal at the end of it all.
This one, the idea of having these characters killed by Wanda, even if they are a cameo, utterly bizzare. What's the point? At least with NWH those characters were all crucial to the story. Here, well you get to see Patrick Stewart in the classic golden wheelchair from the comics before he gets murdered.