Cursor vs Claude Code for refactoring — which wins?

Depends on the refactor shape:

• Single-file polish (rename variables, extract method, tighten types): Cursor and Copilot are both excellent; Claude Code is overkill for this. Cursor’s Tab autocomplete + Cmd+K inline edit is genuinely best-in-class for this use case.
• Multi-file refactor in a known small codebase: Cursor does well — its agent reads workspace files and applies coordinated edits. Claude Code matches it.
• Multi-file refactor in a deep codebase (Magento `vendor/` + custom modules + generated DI): Claude Code wins clearly. Cursor often misses the cross-file dependencies; Claude Code reads the whole graph including vendor.
• Batch refactor across 20+ files (port templates, migrate APIs): Claude Code with sub-agents is the only one of the three that does this well. Cursor can’t parallelise; Copilot has no agent at all.

For day-to-day “clean up this function” work, stay in your IDE’s native AI. For systemic refactors, switch to Claude Code.