Are These 2 Stateents Identical

I need to change some vendor code for tuning purposes. I was hoping that someone could verify that the 2nd statment is identical to the first?

The 2nd runs much more quickly, but I just want to be safe.

DELETE
FROM CONTRACT
WHERE EXISTS ( SELECT 'X'

               FROM CONTRACT_TEMP J 
               WHERE J.CONTRACT_NUM = CONTRACT.CONTRACT_NUM 
               AND J.CONTR_SEQ = CONTRACT.CONTR_SEQ 
               AND J.CONTR_DT = CONTRACT.CONTR_DT 
               AND J.CONTR_TYPE = CONTRACT.CONTR_TYPE );

DELETE
FROM CONTRACT

WHERE (CONTRACT.CONTRACT_NUM,
       CONTRACT.CONTR_SEQ,
       CONTRACT.CONTR_DT,
       CONTRACT.CONTR_TYPE ) 
IN ( SELECT J.CONTRACT_NUM,J.CONTR_SEQ,J.CONTR_DT,J.CONTR_TYPE 
     FROM CONTRACT_TEMP J);