The action is always on point and the series never stops in its tracks, it's always high octane arc after high octane arc.
For me, that's my least favorite part of
Jujutsu Kaisen. The characters and individual arcs are good, but the overall story structure is all over the place. Arcs seem to randomly begin and end without any time to breathe (the flashback arc, good as it might be, is the worst offender in this case). It just doesn't feel that cohesive to me.
On the other hand, there's a lot more to
Chainsaw Man than "pure madness" that people don't give it enough credit for. The madness doesn't just happen out of nowhere, Fujimoto takes a lot of time to build up to these events and give characters more room to express themselves which makes the shocking moments even more shocking. There are plenty of chapters completely dedicated to fleshing out characters with very little action. The overall pacing may be fast, but it's well-planned and methodical.
And personally, I've found that
CSM's craziest moments are much easier to follow than
JJK's (which end up being kind of convoluted with the power system).
Akutami is a little too reliant on text to explain things for my taste (yes, I know that sounds weird coming from the person with a
HxH avatar, but Togashi's writing is much more enjoyable/interesting to read, imo). Fujimoto has a really good understanding of comics as a visual medium, and takes advantage of that to create beautiful and compelling moments that speak for themselves.