> They are not directly comparable since ZFS is also the volume manager for your ZFS filesystems, enabling features like `zfs send` of snapshots or entire filesystems for easy backups.

Btrfs supports both snapshots and sending/receiving them between different hosts. You can also create additional Btrfs subvolumes.

This is mostly what I meant with the differences between zfs and btrfs not being that significant for most: they largely seem to give you the same end result, instead taking a different path to get there. I do know that zfs is better in terms of reliability (or at least people love to bring that up), but it's something I don't have any experience with myself and thus can't comment on.