I think Gojo will win, because
Gojo's infinity trait automatically can't overcome this trait except in exceptional circumstances to deal with it. He expresses this himself, that's why he got Mahogara. The siblings of the two can RELA, so there is no lightning problem for sukuna. Both are already classified in VSBW in speed statements. Sukuna cannot exceed Gojo's infinity with Domain Amplification without Mahogar. Blocking the basic setup from which Domain Amplification comes. So if Sukuna and Gojo fight in 1v1, Sukuna needs to have his AoE amplified to deal damage. And during this time he cannot use slashes. Even if she does, Sukuna's attacks cannot reach Gojo.
As for AoE Extensions, Gojo's energy loss is infinitely close to 0, so you can use RCT throughout the fight. - I also think we're infinite from a stamina perspective here - as long as he can use RCT, Malevolent Shrine can't deal damage that can kill Gojo. Basically the only way for Gojo to kill it is by breaking its bedside for sure. That way he can't use the RCT and he can heal and remove the shards from the Malevolent Shrine he is responsible for.
Sukuna's cuts are not the process that Yuta, even they cannot touch, and he says so himself. He needs to touch it to create a lethal effect. And as long as he is infinite he will use Domain Upgrade, in general Sukuna will not be able to use slashes during his fight. That's why they fight hand to hand.
Gojo can dominate and even intimidate Sukuna in both 2v1 and 3v1 situations. Not only that, but because we're doing the fight 1v1, Sukuna won't have a mahogara next to him. So there is no one to save him in the scene where he faints in a normal fight. Also, while Gojo can live in the Temple of Malevolence, Sukuna cannot. This is because the Boundless Void transfers unlimited information into the mind of his opponent, directing him in the direction of communication and perception. These characteristics of Sukuna cannot be processed.
If we talk about what happened in the previous battle, Gojo may have unintentionally hired him. For example, he didn't use Teleportation, which would have been very useful in multi-person fights rather than one-on-one combat, he didn't use Telekinesis, which allows him to control his opponent's powers, enough, and he aimed the guaranteed hit of Boundless Void at Sukuna's heart rather than his brain.
Sukuna, despite having 1000 years of experience and certificates of certificates, cannot match the Battle IQ of a character like Gojo, who is not even in his 30s yet. Even if they played 2v1/3v1 in battle, Sukuna would take Gojo by guesswork or analysis. Therefore, as Mahogara, Itadori and others said, Gojo won.
And Gojo, despite having a bad length against Sukuna, can turn the tide.
I think that's enough explanation and I hope you will join me. I ask for your support.
Evidence:
Sukuna cannot adapt to eternity without mahoragas and sport is useless
Sukuna's cuts didn't reach Gojo
Sukuna cannot be crossed by Boundless Emptiness
Gojo's collection even in 3V1/Gojo's collection in Hand to Hand (7 pieces will be enough):
1 :
2: 3 : 4 :
5 :
6 :
7: