.classname versus "element.classname"

[ChenXiu]

Given the following html table, are both css rules 100% identical in effect? Why? Or why not?

<table class="classname"><tr><td>Hello World</td></tr></table>

table.classname td { ......... }
- versus -
.classname td { ......... }

Thank you.

Edited August 3, 2022 by ChenXiu

[requinix]

1. https://developer.mozilla.org/en-US/docs/Web/CSS/Specificity

2.

<table class="classname">
  <tr>
    <td>This has the class</td>
  </tr>
</table>

<div class="classname">
  <table>
    <tr>
      <td>So does this</td>
    </tr>
  </table>
</div>

 

[ChenXiu]

Thank you!
I also enjoyed reading the mathematics behind specificity. Cool!