JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tr>
        <td>100</td>
        <td>200</td>
        <td>300</td>
    </tr>
    <tr>
        <td>100</td>
        <td>200</td>
        <td>600</td>
    </tr>
    <tr>
        <td>120</td>
        <td>200</td>
        <td>600</td>
    </tr>
</table>

CSS

.highlight { background-color: gold; }
td { padding: 3px; }

JavaScript

$(function() {
    var $rows = $("tr");
    
    for (oldIndex = 0; oldIndex < $rows.length-1; oldIndex++) {
       var newIndex = oldIndex + 1;
        var $oldCols = $("td", $rows[oldIndex]);
        var $newCols = $("td", $rows[newIndex]);
        
        for (col = 0; col < $oldCols.length; col++) {
           var $newCol = $($newCols[col]);
            if ($($oldCols[col]).html() != $newCol.html()) {
                $newCol.addClass("highlight");
            }
            
        }
        
        
    }
});