Comment 6 for bug 1936871

This is about the only meaningful difference I could find in mksquashfs output. The rest of the differences are inode numbers.
--- manualrun.txt 2021-07-20 17:14:27.298876254 +0000
+++ reviewtoolsrun.txt 2021-07-20 16:47:51.394142282 +0000

-symbolic link /snap/hooks/post-refresh inode 0x118f6102f LINK
-directory /snap/hooks inode 0x7b5360639
+symbolic link /snap/hooks/post-refresh inode 0x7b5360639
+directory /snap/hooks inode 0x7b5360658

and later, the summary concurs on the link-inode difference:

 Exportable Squashfs 4.0 filesystem, xz compressed, data block size 131072
        compressed data, compressed metadata, no fragments,
        no xattrs, compressed ids
        duplicates are removed
-Filesystem size 158835.01 Kbytes (155.11 Mbytes)
- 23.66% of uncompressed filesystem size (671383.43 Kbytes)
-Inode table size 507080 bytes (495.20 Kbytes)
- 23.83% of uncompressed inode table size (2127797 bytes)
-Directory table size 498142 bytes (486.47 Kbytes)
- 39.45% of uncompressed directory table size (1262834 bytes)
+Filesystem size 158835.06 Kbytes (155.11 Mbytes)
+ 23.66% of uncompressed filesystem size (671383.48 Kbytes)
+Inode table size 507124 bytes (495.24 Kbytes)
+ 23.83% of uncompressed inode table size (2127828 bytes)
+Directory table size 498146 bytes (486.47 Kbytes)
+ 39.45% of uncompressed directory table size (1262846 bytes)
 Number of duplicate files found 24728
-Number of inodes 59453
+Number of inodes 59454
 Number of files 51630
-Number of symbolic links 181
+Number of symbolic links 182
 Number of device nodes 0
 Number of fifo nodes 0
 Number of socket nodes 0