Was Sanji given a weapon specifically stated to have scarred/nerf Katakuri in some capacity? Before 955 there was still the Shusui argument that could be considered (even if it was a weaker argument), but Zoro literally got the same sword used by the only man to have scarred Kaido. And he was stated to be the only person, other than Oden, to have tamed the sword. That’s a bit more to go on than “dodged an attack that Gotti was able to react to and block” for Sanji vs Katakuri.
Katakuri was a man who specializes in the same haki that Sanji has more affinity for, at first Kata was using his legs to fight, Kata DF was a food while Sanji was a cook, Kata attacked him and Sanji managed to bypass his system FS and they stared at each other, the diable jambe could potentially counteract his DF and etc ...
In the end, this is just fans forcing parallels, relationships, foreshadowing ...
Oden cut Kaido has nothing to do with Zoro, he inherited his sword, but he will not do the same things as Oden. They are extremely different characters.
Zoro will probably overtake Ryuma, but he doesn't have to do the same steps and fight the dragon.
Zoro won't be nearly as important as you want him to be, try to keep your expectations low, he fighting Kaido is impossible to some extent.