Understanding snapshot summaries and stats ouput

I am updating my statistics evaluation to the latest restic 0.17.1 and trying to make sense of the output of restic snapshots --json. I have the following questions:

  1. (snapshots) data_blobs is rather small, much smaller than the (stats raw) total_blob_count of the last snapshot. Is this the number of blobs added by this snapshot?
  2. Same for (snapshots) tree_blobs, is it tree blobs added?
  3. Should tree blobs be correlated with files / dirs new / changed? E.g. tree_blobs = files_new + files_changed + dirs_new + dirs_changed?
  4. (snapshots) total_bytes_processed is consistent with (stats restore) total_size.
  5. Why is the summary of a backup command different from a snapshots command? (It would be easier if the “Summary object” would be a heading and could be a link target)