Regardless of any arguments oda put the second strongest cp9 against zoro for a reason now at the time im not sure how much stronger zoro is than sanji but its implied at least 20 dorykuu or something since kaku had that advantage over jabra and although sanji looked lyk he had an easier time zoros oppenent was using swords so sanji couldn't have logically beat kaku without someway to defend from his swift sword attacks and his kicks that were like blades it could go either way i see sanji taking it high diff but zoro did it mid-high diff so no it won't be easier for sanji by any means