What is the difference between an AI code editor and a copilot plugin?

AI code editors (Cursor, Windsurf) are full IDEs rebuilt around AI — with inline editing, codebase-aware chat, and multi-file refactoring. Copilot plugins (GitHub Copilot, Cody) add AI features to existing editors like VS Code. Full AI editors offer deeper integration but require switching tools; plugins preserve your existing workflow. For heavy AI usage, dedicated editors are increasingly worth the switch.