Kaido's feat is objectively far superior.
Lifting an entire island with humongous buildings and a mountain terrain, then letting it float to a different location, is better than Fujitora Lifting the entirety of Dressrosa's rubble, not that it wasn't impressive.
At the end of the day, neither feat matters in a 1v1. They're not doing this with physical strength, but their abilities. It's the equivalent of that Fishman dude moving the Noah, he was still a bitch.
It's a really flashy feat for Kaido and befitting of the expectations he has to meet, however, for those thinking that a guy with the ability to freely control Gravity can't lift an island, I'll be waiting for them when Fuji pulls down a fucking moon at EOS