- As far as I know, squashfs is a file system and not an archive format; the "FS" in the name shows the focus.

- It is read-only; Pack is not. Update and delete are not just public yet, as I wanted people to get the taste first.

- It is clearly focused on archiving, rather than Pack wanting to be a container option for people who want to pack some files/data and store or send them with no privacy dangers.

- Pack is designed to be user-friendly for most people; CLI is very simple to work with, and future OS integration will make working with it like a breeze. It is far different from a good file system focused on Linux.

- I did not compare to squashfs, but I will be happy to see any results from interested people.

My bet is on Pack, obviously, to be much faster.