I've spent the last two weeks living in both tools—writing real apps, refactoring messy code, and trying to deploy something that doesn't immediately catch fire. Here's what I actually found, not what the marketing says.
The Quick Overview
GitHub Copilot (v3.0) is still an IDE-first pair programmer. It lives inside VS Code, JetBrains, or Neovim, and it's gotten scarily good at understanding your existing codebase. The 2026 version