Are These 2 Statements Equal?

I believe they are, but I would like another pair of eyes so I don't blow it and get fired since I am changing vendor code. The performance of my version (the 2nd) is far better than the first.

DELETE FROM t
WHERE TYPE IN (SELECT TYPE FROM x

               WHERE process_date = :1
               AND process_status = 'A')
OR TYPE IN (SELECT TYPE FROM X2
            WHERE process_date <=:2
            AND process_status IN ('A','B'));

• the same as :

DELETE FROM t
WHERE TYPE IN (SELECT TYPE FROM x

               WHERE process_date = :1
               AND process_status = 'A'
               UNION
               SELECT TYPE FROM X2
               WHERE process_date <=:2
               AND process_status IN ('A','B'));