Personally it's the mentality of a CLI-tool over an IDE-tool.

I found Cursor's approach very distracting. It's always there making autocomplete suggestions and always available in the sidebar. This means you have lower-quality interactions with it.

With Claude on the other hand, I usually have to think before I use it. It doesn't favour quick questions. This means I have higher quality interactions with it, after I've thought through exactly what I want it to do.