That sort of analysis is testing something on most of those that happen to be two different things on btrfs and ZFS. Specifically, corruption that passes checks

That sort of analysis is testing something on most of those that happen to be two different things on btrfs and ZFS. Specifically, corruption that passes checksums and corruption that does not pass checksums. btrfs' result was obtained by modifying it to disable checksums. How btrfs or ZFS do without the benefit of checksums should only matter for people exchanging disk images. In that case, it would be better to have a userland driver regardless of the filesystem. NetBSD is able to run its filesystem drivers in userspace for this reason.