Are the two SQLs equivalent?

Are the two SQLs equivalent? And , you think which is better. 1.FROM table1

    WHERE

     RTRIM(START_DATE||BNK_CD||STN_CD) IN
     (  SELECT MAX(START_DATE)||BNK_CD||STN_CD
        FROM table1    KYO, table2 SYS
        WHERE START_DATE <= SYS.CNTR_DATE
           AND ( DEL_DATE < SYS.CNTR_DATE OR DEL_DATE IS NULL)
        GROUP BY BNK_CD,STN_CD


     )

2.FROM table1 BT

    WHERE

      EXISTS
     (  SELECT 'A'
        FROM table1    KYO,  table12 SYS
        WHERE KYO.START_DATE <= SYS.CNTR_DATE
          AND ( KYO.DEL_DATE < SYS.CNTR_DATE OR KYO.DEL_DATE IS NULL)
          AND BT.BNK_CD = KYO.BNK_CD    AND BT.STN_CD = KYO.STN_CD
          having BT.START_DATE = MAX(START_DATE)


     )