EnterpriseDB is a clone AND a fork. :-) We work hard to free customers from Oracle vendor lock-in AND stay up with the latest releases and patches of Postgres AND don't break any Postgres native and/or ANSI functionality.
EnterpriseDB is not a clone, it is a fork. That said, it is very cool that they have created an Oracle look-a-like for much less but if you want PostgreSQL that isn't EnterpriseDB.
