Admittedly I was hoping Sukuna won even though I like Gojo more
Gojo is just too much of an "invincible" character for me to root for. It would be like rooting for Mereum instead of Netero, at least in my mind
Sukuna is a strong but beatable entity, Gojo is a character that even special grades would have to pray to land a single hit on
Gojo was born with the 6 Eyes so you'll always run out CE before him, he has arguably the strongest sure hit (instant loss if you get hit by it for even a second as a human), an unblockable attack that can tear through anything, the best defensive ability in the series with very few ways to hit him (1 of which he removed himself lol), and the best technique that allows him to fly, teleport, move at unmatched speeds, basically do everything
While Sukuna could be worse due to Open (I pray he doesn't have a bunch of Limitless level techniques waiting in the wings) as of right now he feels "grounded" in comparison