Keep Cursor when the editor is the daily coding surface
Cursor should stay first when the developer wants the editor itself to be the AI workspace: tab completion, repo-aware chat, inline edits, agents, review, and team administration all sit close to normal coding. The coding-tools brief positions Cursor as the AI-native IDE path, so the key question is whether moving the primary editor is acceptable.
Use Codex when the task should be handed off
Codex is stronger when the work can be framed as a reviewable repository task: inspect the repo, edit a bounded set of files, run verification commands, and summarize the result for human review. That makes Codex a better fit for scoped bug fixes, migration notes, documentation changes, and test-backed implementation slices than for every keystroke inside an editor.
Adoption risk is different for each product
Cursor adoption risk is mostly about editor migration, team settings, privacy mode, and whether developers accept a new daily surface. Codex adoption risk is more about task boundaries, repository instructions, permissions, verification commands, and review ownership. Treat them as complementary control models before deciding which one becomes the default.