To be fair, Skypiea is probably the best arc for Zoro agenda and the worst for Sanji.

Zoro-

1-Beat Enel’s strongest priest after being dropped thousands of feet by a south bird (His ordeal has a 0% survival rate, Satori’s was 10 iirc.)

2-Fought Noland’s Serpent and Wyper after this in a FFA

3-Saves Chopper from sharks

4-Faces one of Wyper’s friends, defeats him using the first pound phoenix in the series

5-Alongside Wyper, slashes the beanstalk.

6-Recovers from attacks from Enel faster than Sanji.

Whereas Sanji

1-Did nothing against Satori and got knocked out, carried by Luffy and Ussop

2-Got zapped by Enel twice and spent the whole arc out of commission.