Jinbei is a fishman with strong haki and water moves, Sanji is a human that draws all of his abilities from science and his signature moves use fire. Jinbei can fight in the water but we never get naval fights, Sanji excels in aerial fights but he always gets wrecked in the air. Jinbei is a Chad and a gentleman, Sanji is rude and a simp.
Fishman - Human
Haki - Science
Water - Fire
Naval fighter - Aerial fighter
Punches - Kicks
Leader - servant
They even teamed up and used their very strongest moves against the same enemy, water and fire.
I don't know why this gets ignored in favor of the nonsense we see every other day. You know very well what Oda means by this.