Windsurf vs Cursor: I rebuilt the same feature twice — here’s how the editors actually change a solo dev’s day

The discovery that surprised me

I assumed Cursor would be the better daily driver and Windsurf the “weekend project” IDE. After two days of rebuilding the same feature twice — once in each editor — I flipped. Windsurf felt calmer for greenfield planning and multi-file changes; Cursor felt sharper for surgical edits and fast feedback loops. Neither was universally “better.” The right one depended on whether I was reshaping a codebase or threading a precise fix through an existing one.

More important: both tools only clicked after I stopped asking for miracles and started working in small, testable steps. Below is the exact, repeatable workflow I used. You can copy it and reproduce my results in under 30 minutes on a small repo.

The test project and rules

I used a small, realistic stack: a minimal web app with a frontend component library, a REST backend, and a couple dozen tests. The task was the same in both editors:

• Rename a model field across backend and frontend (plus migration and tests).
• Add a debounce to a search UI and avoid an extra request on blur.
• Fix a type mismatch that only appears in CI (strict TypeScript).

No code dumps, no “build it all” prompts. I forced myself to work like I do on client projects: plan, make a small change, review the diff, run tests, repeat.

Setup you can replicate in 5 minutes

Cursor

• Install Cursor (desktop). Open your repo.
• Open the chat sidebar. It’s workspace-aware by default.
• Use the editor’s inline edit flow: select code, invoke chat from the selection, describe the change, and review a diff before applying. Cursor suggests per-hunk diffs you can accept or reject.
• Reference specific files with @filename in chat to anchor context.
• Use the built-in terminal to run tests between edits.

Windsurf

• Install Windsurf (desktop). Open the same repo.
• Use its workspace-aware chat to outline changes and request multi-file edits. It returns a diff preview across affected files before applying.
• Accept or reject file-by-file. You can re-run with a narrower instruction if the change is too broad.
• Lean on the IDE’s autocomplete to flesh out small glue code once the big change lands.
• Run tests from the integrated terminal after each step.

The 30-minute, step-by-step bake-off

Phase 1 — Plan the rename

Prompt (both editors): “We’re renaming model field userName -> displayName across backend and frontend. List files likely affected based on imports and usage. Propose a minimal-change plan: migration, code updates, and tests to touch.”

• Windsurf behavior: It produced a calm plan and a short file list. When I asked it to start with the migration plus a single backend file, it offered a multi-file diff preview touching only what we agreed.
• Cursor behavior: It listed more potential call sites (some false positives). When I asked for the same minimal set, it generated a focused diff and a sharper explanation of the migration’s side effects.

Counter-intuitive finding: Asking both for the smallest possible change up front reduced later clean-up more than any “be smart” prompt. Vague ambition = wide diffs.

Phase 2 — Apply diffs and run tests

Instruction (both editors): “Apply the agreed edits, show a diff, and stop.”

• Cursor: The per-hunk diff review was excellent. I could accept half a file and reject the rest. It was easy to avoid collateral style changes.
• Windsurf: The file-level diff preview was clean. On the first try it touched one extra helper; I rejected that file and re-ran with a narrower scope. Second try was perfect.

Tests caught one missing import in both runs. Fixing it was a two-line change; I used autocomplete to nudge it in both editors. Cursor’s suggestion showed up a beat faster on my machine; Windsurf’s suggestion was slightly more complete.

Phase 3 — Debounce the search UI

Prompt (both editors): “Implement a 300ms debounce for the search input, prevent extra network requests on blur, and update the unit test that asserts only one request per keystroke batch.”

• Cursor: Great at the local change: I selected the component, asked for a targeted edit, and reviewed the inline diff. It left test updates as a follow-up (which I prefer).
• Windsurf: Proposed updating the component and the test together. The multi-file diff came back coherent on the first attempt.

Limitation you’ll hit: If your component imports are tangled, either editor can introduce a circular import when adding a debounce utility. The fix was to keep the debounce local and resist “extract to util” in the first pass.

Phase 4 — The CI-only type mismatch

Prompt (both editors): “TypeScript error appears in CI only: [describe the error message]. Suspect a different tsconfig path mapping in CI. Propose a minimal diagnostic and a change that compiles locally and in CI.”

• Cursor: Very good at quickly enumerating likely causes and proposing a single-line tsconfig adjustment. It also suggested adding a small script to detect path mismatches.
• Windsurf: Offered a brief checklist and a two-step plan (reproduce locally with CI flags, then tweak config). It generated the config diff and a short README note in one go.

Counter-intuitive finding: Windsurf’s “here’s the plan + commit-sized diff” flow reduced my back-and-forth on cross-cutting config changes. Cursor’s speed was ideal for one-file surgical fixes, but I had to ask explicitly for the doc note.

Where each editor wins (and why)

Cursor wins when…

• You know exactly where to cut. Highlight code, ask for the change, inspect a tight diff, accept/reject hunks. It’s a scalpel.
• You want fast iteration. The chat + inline edit loop is short. I felt comfortable doing five micro-iterations instead of one big leap.
• You’re validating with tests as you go. Cursor’s flow made it natural to run tests after each accepted diff.

Windsurf wins when…

• You’re changing multiple files with a narrative. It’s good at “Let’s do A → B → C” and returning a coherent, multi-file diff you can audit.
• You want the IDE to carry a plan forward. It tended to remember the steps we agreed on and keep subsequent diffs aligned with the plan.
• You’re scaffolding new pieces. Bigger edits (new file + companion test + doc note) landed more smoothly.

Honest limitations (both sides)

• Overreach. If you ask for “fix everything,” both can change too much. Your defense is asking for the smallest viable change and reviewing diffs ruthlessly.
• Path and import hallucinations. On mid-size repos, either editor may propose a non-existent import path. Keep the file tree visible and ask it to use existing imports only.
• Autocomplete temptation. Multi-line completions can sneak API misuse past you. Compile and run tests after every accepted chunk.
• Context size limits. Very large repos still require you to point the model at the right files (use @file references). Don’t assume it “just knows.”

Replicable, tool-agnostic prompts that worked

• Plan small: “Suggest the smallest change that achieves X. List exactly which files you’ll touch and why. Stop after showing a diff.”
• Guard rails: “Do not create new helpers or change lint rules. Use only existing imports. If something is missing, stop and ask.”
• Test-first nudge: “Before editing, show me which tests will fail and how we’ll update them.”
• Explain diffs: “For each file in the diff, summarize the intent in one sentence.”

Speed notes you can evaluate yourself

• Autocomplete feel: On my machine, Cursor’s multi-line suggestions popped earlier; Windsurf’s were slightly more complete. YMMV — try both on the same file.
• Diff review: Cursor’s per-hunk acceptance made precise refactors comfortable. Windsurf’s per-file accept/reject made broader changes easier to police.
• State tracking: Windsurf felt a bit better at remembering the multi-step plan across prompts; Cursor felt better at responding to tiny, localized asks.

Privacy and practicality

• Sensitive code: If your repo is private or regulated, review each tool’s data handling and settings before connecting a client codebase. Assume cloud inference unless you’ve explicitly configured otherwise.
• Telemetry: Both editors have telemetry toggles. If that matters, visit settings first.

A 30-minute head-to-head you can run today

Clone a small repo you don’t mind changing. Set a timer for 30 minutes and do this twice (once per editor):

• Rename a field in one backend file and one frontend file. Ask the editor to plan and apply only those two edits. Review the diff. Run tests.
• Add a 300ms debounce to a search input. Keep it local; no new helpers. Review the diff. Run tests.
• Introduce a harmless type mismatch, then ask the editor to diagnose and propose the smallest config change. Apply, compile, run tests.

Score yourself on three axes: “diff tightness,” “number of test runs to green,” and “how often I had to say no.” You’ll feel the difference between the editors fast.

Which to open first?

• Precise refactor or bugfix in known files → Cursor.
• Multi-file change with a short narrative (edit + test + doc) → Windsurf.
• Blank page/new module → Start in Windsurf for the plan, then switch to Cursor for surgical follow-ups.

Actionable endgame

Don’t choose an editor by vibes. Run the 30-minute bake-off above on your own repo and keep whichever makes your diffs smaller and your tests greener with fewer prompts. Then codify two house rules in a README:

• Always ask for the smallest possible change.
• Never accept a diff you don’t understand (force an explanation per file).

Those two rules did more for my day-to-day speed than any model upgrade. The tool is the assistant; your diff review is the job.