HRV big discrepancy between Night readings and morning Health Snapshot

I noticed a big discrepancy on the data from the morning report for HRV, where in my case on regular days with decent sleep, it's something between 59-65, the 7 days average is always around 61-62

And everytime I run the health snapshot in the mornig, even before get out of the bed, the HRV readings are a way higher, for example:

Today:

  • night HRV 61
  • Health Snapshot 101.

Yesterday

  • Night HRV 62
  • Health Snapshot 97

What number should I trust ? (if any) Why such a big difference ?

Any insight on this ?

Thanks,