CLIとREST APIで報告されるSnapshotサイズの値が異なる

The size value displayed by the snapshot show コマンドで表示されるサイズの値が、REST API（GET /api/storage/volumes/*/snapshots）で表示されるsizeまたはlogical_sizeの値と一致しません。

• CLI：

ontap916::> snapshot show -vserver svm1_ontap916 -volume voltest1 -snapshot hourly.2025-08-13_1305

                  Vserver: svm1_ontap916
                   Volume: voltest1
           cp Count (for sorting): 10671
                  Snapshot: hourly.2025-08-13_1305
               Creation Time: Wed Aug 13 13:05:00 2025
               Snapshot Busy: false
               List of Owners: -
               Snapshot Size: 160KB
         Percentage of Total Blocks: 0%
         Percentage of Used Blocks: 16%
                  Comment: -
              7-Mode Snapshot: false
      Label for SnapMirror Operations: -
               Snapshot State: -
            Constituent Snapshot: false
                Expiry Time: -
            SnapLock Expiry Time: -
     Has the SnapLock Snapshot Expired: -
Seconds until the SnapLock Snapshot Expiry: -

•  API：

curl -X GET "https://10.128.242.60/api/storage/volumes/aa03b8a6-0b82-11f0-94a6-005056b0330a/snapshots/55a83a9f-bed1-4b46-aa83-70fbb47aefb9" -H  "accept: application/json" -H  "authorization: Basic YWRtaW46UEBzc3cwcmQ="
Request URL
https://10.128.242.60/api/storage/volumes/aa03b8a6-0b82-11f0-94a6-005056b0330a/snapshots/55a83a9f-bed1-4b46-aa83-70fbb47aefb9

{
  "volume": {
    "uuid": "aa03b8a6-0b82-11f0-94a6-005056b0330a",
    "name": "voltest1"
  },
  "uuid": "55a83a9f-bed1-4b46-aa83-70fbb47aefb9",
  "svm": {
    "uuid": "b1096c5d-c77b-11ef-b722-005056b0330a",
    "name": "svm1_ontap916"
  },
  "name": "hourly.2025-08-13_1305",
  "create_time": "2025-08-13T13:05:00+09:00",
  "size": 634880,
  "version_uuid": "55a83a9f-bed1-4b46-aa83-70fbb47aefb9",
  "provenance_volume": {
    "uuid": "aa03b8a6-0b82-11f0-94a6-005056b0330a"
  },
  "logical_size": 1078611968,
  "compress_savings": 0,
  "dedup_savings": 0,
  "vbn0_savings": 0