Objectively speaking now, all wanking aside:
The fight should be a complete slugfest from a power level POV. These two are at the peak of jujutsu no one else ever achieved.
I expect Sukuna to throw some amped up attacks next chapter.
However, narratively, I doubt we will get a satisfying conclussion to the fight. There is bound to be shenanigans from Kenjaku in some way.
Sukuna, curse as he might be, does look forward to the fight against Gojo. We know that much. And if he wants something he's damn sure to get it.
In short - Whether Gojo wins or Sukuna wins doesn't really matter as long as the winner comes through a zero interference 1 v 1