What Do I Lose Going From BTRFS To EXT4/XFS Filesystem

Due to my lack of knowledge on the fine points -and the coarse points, too- of the btrfs filesystem (and the problems that seem to crop up for no reason), I am thinking of switching the backup location from btrfs to a EXT4 or XFS filesystem for our backup files and images.

Would I still get de-duplication feature (at the file-level)? Any idea how much more space I would need if I make this switch?

Thanks for any direction…