git-branchless doesn't (yet) aim to integrate with hosted Git providers in any particular way. You just use remotes and push as normal.
I think the CLI is mostly at parity in terms of features. git-branchless has `git undo` while gt has `git repo sync`. (Tracking issue for git-branchless's sync: https://github.com/arxanas/git-branchless/issues/174)
git-branchless integrates more directly with Git, so you don't need to learn any new commands if you don't want to. If you ruin your stack by amending an old commit, a warning will appear telling you to run `git restack`, which will fix it.
Besides that, git-branchless does rebase operations in-memory, which makes it faster.
I think the CLI is mostly at parity in terms of features. git-branchless has `git undo` while gt has `git repo sync`. (Tracking issue for git-branchless's sync: https://github.com/arxanas/git-branchless/issues/174)
git-branchless integrates more directly with Git, so you don't need to learn any new commands if you don't want to. If you ruin your stack by amending an old commit, a warning will appear telling you to run `git restack`, which will fix it.
Besides that, git-branchless does rebase operations in-memory, which makes it faster.