1. Nope you said haki. And never specified which one so...
2. Oda stated he was a coo specialist yet he doesnt have a better than zoro and luffy is the one the ended up with future sight first. Also coby is the one stated to also have advanced coO.
3. You have yet to show said feats that place sanji ahead of zoro I'm coO
It is necessary to be focused to use CoO effectively, Sanji lost control when he saw an alleged harassment.
1- On SBS in a question about proficiency in Hakis the Sanji Observation is highlighted by Oda.
2- Zoro's observation was never praised and highlighted as Sanji's was.
3- Sanji dodged Katakuri's jujube when he was paying attention to others around him.
4- Sanji located and summoned Tashigi in distress at an absurd distance on Punk Hazard.
5- Luffy warned the Supernovas that Kaidou and Big mom would make something big and Zoro would match faster and more effectively than anyone else.
In conclusion, there is nothing in 1030 manga chapters or media such as SBS or Databooks that gives any hint that Zoro's Observation is superior or comparable to Sanji's.
Sorry my English is bad.