comparaison de deux listes

$query_Recordset1 = "SELECT mot FROM ep_mot1";
$Recordset1 = mysql_query($query_Recordset1, $mysql_link) or die(mysql_error());
$row_Recordset1 = mysql_fetch_assoc($Recordset1);
$totalRows_Recordset1 = mysql_num_rows($Recordset1);
$list1= $row_Recordset1['mot'];

$query_Recordset2 = "SELECT mot FROM ep_mot2";
$Recordset2 = mysql_query($query_Recordset2, $mysql_link) or die(mysql_error());
$row_Recordset2 = mysql_fetch_assoc($Recordset2);
$totalRows_Recordset2 = mysql_num_rows($Recordset2);
$list2= $row_Recordset2['mot'];

$query_Recordset1 = "SELECT * FROM ep_mot1 WHERE mot";
$Recordset1 = mysql_query($query_Recordset1, $mysql_link) or die(mysql_error());
$row_Recordset1 = mysql_fetch_assoc($Recordset1);
$totalRows_Recordset1 = mysql_num_rows($Recordset1);
$list1= $row_Recordset1['mot'];

$query_Recordset2 = "SELECT * FROM ep_mot2 WHERE mot";
$Recordset2 = mysql_query($query_Recordset2, $mysql_link) or die(mysql_error());
$row_Recordset2 = mysql_fetch_assoc($Recordset2);
$totalRows_Recordset2 = mysql_num_rows($Recordset2);
$list2= $row_Recordset2['mot'];