Yes, you can make it so. You need just edit tpl_comment.php template file and change dispalying of votes. Replace:
function getCommentVoteValue( &$comment )
{
$value = intval($comment->isgood - $comment->ispoor);
if ($value == 0 && $this->getVar('button-vote', 0) == 0 && $this->getVar('get_comment_vote', 0) == 0) {
// if current value is 0 and user has no rights to vote - hide 0
return;
}
if ($value < 0) {
$class = 'poor';
} else if ($value > 0) {
$class = 'good';
$value = '+' . $value;
} else {
$class = 'none';
}
?>
<span class="vote-<?php echo $class; ?>"><?php echo $value; ?></span>
<?php
}
with something like:
function getCommentVoteValue( &$comment )
{
?>
<span class="vote-good"><?php echo $comment->isgood; ?></span> / <span class="vote-poor"><?php echo $comment->ispoor; ?></span>
<?php
}