JSFiddle - React, Tailwind, and code Playground

HTML

<table>
<tr class="new">
  <td>150</td>
  <td>200</td>
  <td>300</td>
</tr>
<tr class="prev">
  <td>100</td>
  <td>200</td>
  <td>600</td>
</tr>
</table>

CSS

.Changed{
    background-color:red;
}

JavaScript

$('table tr.new td').each(function(i){
    //First TR td, Previous Rows
    td = $(this);
    check = $('table tr.prev td:eq('+i+')');
    console.log(td,check)

   if(td[0].innerText != check[0].innerText)
   {
        check.addClass('Changed');
   }
})