Error handling

When handling errors in an RPG program is it better
to use the *PSSR with the SDS, or import the
_EXCP_MSGID? or is there really a difference? 
Besides the Number of lines of code!

Example 1.
 * ...
D ErrCPF      S         7    import('_EXCP_MSGID') 
 * ... the file keithm doesn't exist.
C            If  System('CLRPFM FILE(keithm)') <> 0  
C  ErrCPF    Dsply    
C            EndIf                                    



or Using Example 2.

 * ...
D PgmSts         SDS                
D  ErrTyp                40     42  
D  CPFNum                43     46      
 * ... the file keithm doesn't exist.
C             Eval  rc = System('CLRPFM FILE(keithm)')

 * ...
C   *PSSR     BegSR 
C             Eval ErrCPF = ErrTyp + CPFNum
C   ErrCPF    dsply  
C             EndSR


Thanks
K.

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