How to use `tmutil compare snapshot_path`? man tmutil shows

compare [-@acdefglmnstuEUX] [-D depth] [-I name] [snapshot_path | path1 path2]


If a snapshot path is provided as the sole argument, 
tmutil will compare the computer to the specified snapshot.


Does the 'snapshot' mean the result of tmutil listlocalsnapshots / (APFS snapshot)?

I tried several ways but I could not make it work.
From man tmutil: 

snapshot
  A directory inside a machine directory that represents a single initial or
  incremental backup of one computer. The word "snapshot", in most contexts, is a
  generic term and is not to be confused with a "local Time Machine snapshot",
  which is simply a snapshot stored locally on the computer. E.g.,

    /Volumes/Chronoton/Backups.backupdb/thermopylae/2011-07-03-123456


I read this as "a local snapshot is not the same as a snapshot", with tmutil compare only able to handle the second.