I don't know anything about Sybase, but if that dump is something akin to "pg_dump", then you are comparing apples and
oranges.
Moreover, the base backup is compressed, and I don't know if the Sybase dump is.
If you had used PostgreSQL v13, you could check the backup for completenes. But the best test for a backup is to
restoreit.
Yours,
Laurenz Albe
--
Cybertec | https://www.cybertec-postgresql.com
FWIW, if this is of any help, Sybase dumps are conceptually very similar to those of MS SQL Server. That being said, I
don'thave any other insight to offer but hoping this might help someone else.
- Ken W