I have looked at both but only used git-autofixup. Some observations:

- git-autofixup has a changelog

- git-autofixup includes sober, technical documentation that actually explains how it works. OTOH, git-absorb has a great elevator pitch for users that are not so familiar with Git.

- git-autofixup does not have unresolved bugs, unlike git-absorb

- git-absorb creates fixup commits for the last 10 commits, which seems really odd. It's better to use symbolic references like @{upstream}, but it looks like they dont' support this yet?

- git-autofixup is stable and mostly done software, while git-absorb has a sizeable list of todos

- git-autofixup is written in Perl (like some tools in Git itself), making it easier to install than git-absorb which uses Rust.

Then again, as author of this article, I'm obviously biased ;)