Oh, man. I love Akutami's way of drawing whole bodies and - like others have said - the hands!!!
But, from an overall point of view, I think I'd prefer Fujimoto. The expressions and suspense that he uses in Chainsaw Man and Goodbye Eri are so unsettling in the best of ways. Not to mention, the gore and gross-out aspects balance crazy well with how psychologically focused the works are at their core.
I actually started looking at Akutami and Fujimoto's work at the same time due to surface-level similarities, and I think that I'd really love to study JJK and CSM side-by-side.