For example: changing a PR’s parent, rearranging the order of PRs in the “stack”, adding a new PR between 2 existing PRs, etc. The difference is mostly pragmatic: stacked PRs use branches, and can have multiple commits in a single atomic change; stacked commits use a single commit as the unit of atomic change. git-stack – Tagline: “Stacked branch management for Git” I haven’t used this one enough to have an opinion on it, but it seems useful for working with Stacked PRs – since it has the approach that “Branches are the unit of work and review”