Lmao it's actually funny you make this comparison. I was comparing them myself for the past couple days. Reading Gojo vs Sukuna reminded me of Chrollo vs Hisoka.
Both of these fights legit require pen and paper to follow and maybe even a calculator lmao. And both of these fights are as cut throat as they get, someone was guaranteed to catch a body by the end of them, and in both fights the winner is taking the safest most guaranteed route to victory, not tryna be honourable but simply realistic. Getting this win at any cost, plain and simple, not trying to be pretty while doing it.
In doing so both Chrollo and Sukuna pretty much used borrowed abilities throughout the entire fight lmao.
Atm I prefer Chrollo vs Hisoka, that fight on a tactical/technical level is the best I've ever read.
But maybe I just need to reread Sukuna vs Gojo. Ever since Gege pretty much admitted he didn't know how some abilities work I started to zone out on a lot of the nitty gritty of JJK battles, a lot of it seems like improvisation, and I can't care to put so much effort into something which the author himself may not have a complete grasp on.
Honestly JJK as a whole is like a blend of HxH and Bleach, it has HxH's complexity but it's delivered in Bleach fashion (style> substance kinda vibe), which makes it that much more puzzling than HxH even though HxH is just as complex if not more, but it's just better laid out.
Tldr; I think Sukuna vs Gojo is far more impactful, and downright a better spectacle than Chrollo vs Hisoka. Which is enough to place it above Chrollo vs Hisoka. But I just can't get over how technically sound Chrollo vs Hisoka is, so until a reread and deeper dive changes my mind, I give Chrollo vs Hisoka the nod.