DFSORT GET DUPLICATES

The below sort card helps to get duplicates to an out file,also,we get without duplicate records.
Best Sort card

//MATCH EXEC PGM=SORT
//IN1 DD DSN=... input File1 (FB/10)
//IN2 DD DSN=... input File2 (FB/10)
//SORTOUT  DD SYSOUT=*  ...without duplicate records
//SORTXSUM DD DSN=...out file with duplicate records
 //SYSIN DD *
    SUM FIELDS=NONE,XSUM
 /*

We can get duplicates into SORTXSUM file.