No, RSYNC snapshots are nowhere near as quick as an instant BTRFS, and I don’t think the word ‘snapshot’ - which sounds as if you’re taking a quick photo of your system to be restored, can apply restoring them with parsing can also take a long time - and with timeshift I had this fail also when making snapshots to an external disk. Snapshots should really go on Root, they aren’t supposed to be backups.