@Shishi I can completely answer the question. Zoro's attack is entirely directed and aimed. The way he's drawn with his blade and his stance beforehand. There is training and skill. Compare that to Roger. Its far messier, lacks finesse, and is far more comparable to Big Mom and how she just uses her sword, again, as a conduit for her strength (same with Kaido and his club). So far what we know about Roger is that he just straight up swings his sword like a billy club and it outputs his massive Haki, comparable to Whitebeard. You guys KNOW this difference, yet you refuse to acknowledge it because you can't accept it as a possibility.
I knew the brigade would come and attack me for having this opinion lmao. Ill be here to explain this concept again when Mihawk isnt shown above Shanks in portrayal, regardless of swordsmanship skill