PITR restores your last full backup (or snapshot) and plays the transaction log until the point in time you set so it can be very precise. Volume snapshot rest

PITR restores your last full backup (or snapshot) and plays the transaction log until the point in time you set so it can be very precise. Volume snapshot restoration is atomic and probably faster, but it gets you only the specific point in time where the snapshot was taken. I guess the worst case in terms of storage usage in both mechanisms are not that different, but PITR should be fully transparent performance-wise.