Windsurf has plugins for Jetbrains products, for vim, for emacs, for Visual Studio (not code), XCode, and even eclipse. They try to get as much of the market as possible, while Cursor focuses on the core functionality.
Whenever I tried Windsurf Editor, or their plugin for vim, and Intellij, it didn't feel polished at all. The basic function of autocomplete felt much much snappier on Cursor, and even on GitHub Copilot for vim/intellij.