$querycalcdif = mysql_query("SELECT username, keycount, clickcount, wpuserid FROM wp_userversus
WHERE username = '$wpuser1' OR username = '$wpuser2'") or die(mysql_error());
$min = $max = 0;
	while$rowcalc = mysql_fetch_assoc($querycalcdif))
{
if($rowcalc['keycount']>$max || $max==0)
{
$max = $rowcalc['keycount'];
}
elseif($rowcalc['keycount']<$min || $min==0)
{
$min = $rowcalc['keycount'];
}
}

	$keydif = $min - $max;
	echo $keydif;