Server Administration :: How To Compare DB Parameters

I recently discovered that there was a difference in my QA and prod environments, which I have since rectified.

SQL> select DBMS_STATS.GET_PARAM('METHOD_OPT') from dual;
DBMS_STATS.GET_PARAM('METHOD_OPT')
--------------------------------------------------------------------------------
FOR ALL COLUMNS SIZE 1
SQL> select DBMS_STATS.GET_PARAM('METHOD_OPT') from dual;
DBMS_STATS.GET_PARAM('METHOD_OPT')
--------------------------------------------------------------------------------
FOR ALL COLUMNS SIZE AUTO

I found a script that allows me to compare values from v$parameter

set pagesize 1000
col name format a28
col local format a20
col remote format a20
select local.name, local.value local,
remote.value remote,

[code]....

Is there other SQL code or another methode out there that would find differences in my DB's such as the method_opt setting, which don't appear in v$parameter.