You are taking just two three recent comments in the thread and ignoring whole other several pages of content. And there is nothing wrong in comparing Luffy's and Zoro’s strength, Zoro unlike Luffy and Sanji is a strength driven character. It would be shame if he is not on par with Luffy as his first mate and rhm. Luffy’s power comes from his resilience and his zeal to protect his nakama, Luffy struggles and takes help. Zoro on the other hand take his opponent as competition and seems them as a way to grow strong. Oda has always shown how strong is zoro by people mistaking him as captain. In water 7 by Franky’s group, skypiea by ohm, in dressrosa, in Saboady. He is classified as supernova and worstgen, had conqueror’s just like Luffy.