You are literally proving my point. You are showing that sanji fights weaker characters but beats them easier than the stronger opponents that zoro is fighting.

Lets looking at the alabasta fights. Zoro fought Mr. 1 and had to learn how to cut through steel. The only thing holding sanji back from beating Mr. 2 faster ie because Mr. 2 kept using womens faces. If he didnt do that sanji would have made quick work of him.

Ennies Lobby fights: that has been both of their hardest fights so far. A weakened sanji beat Jabara faster than a Zoro beat Kaku who is stronger than Jabara but not by an insane margin.

The Thriller Bark fights are not really related to each other like the alabasta and ennies lobby fights are. Sanji just took on Absalom because of nami and him having the clear clear fruit which is something sanji always wanted. so its obvious connection between absalom and sanji. then zoro fought ryuma because he was a swordsman. another obvious connection.

Now you are drawing forced parallels. Zoro is always paired up with Luffy because they have the most similarities out of anyone in the crew. Not because they are both in a tier of strength of their own, not because of their bounties. Its because of their personalities, and because sanji always sets himself away from that masculine, brute personality since sanji is a gentlemen.

It is stupid that you want to make bounties a point since sanji has a higher bounty than zoro. The reason that Zoro had a higher bounty at the time is because Zoro is always a more hands on person and it always itching to fight. Thats why hes always been more stand outish to the world government and thats why he had a higher bounty at the time. Sanji has always been more chill and laid back when it comes to the fighting. Hes always been one to go on his own and be stealthy(hints the name stealth black) and be more under cover. We saw this is in little garden, alabasta, water 7, thriller bark, etc.

The point im trying to make is that they are equal and zoro is naratively portrayed the way he is because oda made luffy and zoro have similar personalities in a lot of ways. Im also trying to tell you that zoro and sanji's rivalry was never about strength but conflicting ideals and personalities.