Why is Oracle's dbms_metadata.get_ddl returning different results?
You can control whether or not the storage parameter is included by using DBMS_METADATA.SET_TRANSFORM_PARAM. It's possible that you changed this in one of your sessions.

To suppress the storage parameter, execute the following and then run the GET_DDL again:

EXECUTE DBMS_METADATA.SET_TRANSFORM_PARAM(DBMS_METADATA.SESSION_TRANSFORM,'STORAGE',FALSE);


When you're finished, you can set it back to the default by running this:

EXECUTE DBMS_METADATA.SET_TRANSFORM_PARAM(DBMS_METADATA.SESSION_TRANSFORM,'DEFAULT');