Assuming you are talking about the OS level signature with a Pure snap… Yes it will be identical (because everything formatted on the disk is Identical).
If you unmount the disk and run xfs_admin -U generate /dev/mapper/XYZ this should regenerate that UUID.
Otherwise, if the snap you are referring to is a VMware based snap and the UUID is the vvol UUID. From a VMware perspective, I think the vVol UUID is identical. I’ve only ran across issues with this when running Get-VvolUuidFromVmdk and subsequently Get-PfaVolumeNameFromVvolUuid.
In that case Get-PfaVolumeNameFromVvolUuid will actually return two disks. Just filter out the one containing -snap-
Hope this helps!