Comparison of internal tables is sap abap

DESCRIBE TABLE: TAB1 LINES L1,     
               TAB2 LINES L2.     
                                  
IF L1 <> L2.                       
 TAB_DIFFERENT = 'X'.             
ELSE.                              
 TAB_DIFFERENT = SPACE.           
 LOOP AT TAB1.                    
   READ TABLE TAB2 INDEX SY-TABIX.
   IF TAB1 <> TAB2.               
     TAB_DIFFERENT = 'X'. EXIT.   
   ENDIF.                         
 ENDLOOP.                         
ENDIF.                             
                                  
IF TAB_DIFFERENT = SPACE.          
 " ...                            
ENDIF.                             

IF TAB1[] = TAB2[]. 
" ...             
ENDIF.