Literally the only similarity between Oden and Zoro is they both used Enma
Which is an important similarity given how important swords are to the people of Wano. Zoro’s fighting to liberate Oden’s island using the only thing Oden left his daughter. Symbolically, that’s a big deal.
They’re also the only two to ever scar Kaido.
Oden and Zoro’s attacks also both follow the pattern of being a mix of Japanese food puns and mythology.
Oden also has bits of Sanji.
He's a good cook.
Shown to be a womanizer in his early Wano days.
He let go of the rope that allowed him to join Whitebeard in the final minutes of that challenge because he heard a woman crying.
That’s a stretch to put Sanji in somewhere he doesn’t belong in my view. If Oden was meant to be representing Sanji in some fashion, then Sanji would have fought Kaido along with the other people carrying Oden’s will, like the Scabbards, Luffy and Zoro.
It’s like saying Oden’s like Brook as both are womanising swordsmen with a fondness for singing Binks Sake. Technically true if you stretch the point, but quite irrelevant in the grand scheme of things.
Or that Zoro and Whitebeard are meant to be compared the same because they both refuse to show their backs to the enemy. Zoro has nothing to do with Whitebeard, and Sanji has nothing to do with Oden.