I'll just c/p my other comment:

Chainsaw Man is better by a mile, but I think you're severely underrating JJK's substance. It's got a ton of theming and symbolism, mostly very rooted in Japanese religious heritage and some that I think literally just doesn't end up being translated all that well (e.g. the narrative is all about curses with a lowercase c).

And also add that Chainsaw Man actually does do a lot of powerscaling, though it was more prevalent in Part 1 and it usually doesn't take center stage except when Primal Devils are relevant. Probably the most iconic example of doing theming and powerscaling at the same time are the Gun Devil attacks, because there's obviously thematic and narrative weight to them, but a substantial portion of it is also "This thing killed 300,000 people [and leveled part of a city!] in 2.4 seconds," which is inevitably relevant to the issue of opposing the Gun Devil, though ironically the main practical results of its feats are that they are themselves terrifying and thereby making the Gun Devil more powerful.

JJK also does way less powerscaling later on too, because the rank system becomes irrelevant and, like often happens, it becomes more "here's the top tier and here's everyone else and we don't really know how to compare people in the top tier except by having them fight to the death, at which point knowing their comparative strength is no longer a tactical advantage because one of them is dead". Like 90% of the powerscaling content of the last ~quarter of the series is "Gojo is better than you" and "Sukuna is better than you."