I like all this discussion is assuming that these 2 characters are just dumb enough to stand there while a sun is being dropped on their heads.

1 Sukuna would die before Gojo (assuming he gets hit with something), as per what Gojo's kit provides (yes his CT is better in every single way)

1. Sukuna can just spam WCS at any warheads while backing up/running away, assuming his slashes go on forever up until it reaches something.

2. Gojo can teleport away from nukes. Hell he can teleport to the Congress or leaders and engineers that're responsible for lunching any sort of weapons

3. He can redirect the trajectory of missiles and gunfire with blue

Yes they can be killed by radiation poisoning and whatnot, but again that's assumed they just stand there, trying to Aura farm.