Since version 2.0 it is possible to use any content and not only images. Here are some examples.
[image-comparator method="from-right" width="100%" value="60" link_images="false" overlayed_slider="false"]
[image-comparator-left]
<div style="height: 280px">
<h2 style="padding-top: 150px;">Slide to the left, to see our</h2>
<h2>newest video.</h2>
(This is text)
</div>
[/image-comparator-left]
[image-comparator-right]
https://www.youtube.com/watch?v=dk7JKfiVC7o
[/image-comparator-right]
[/image-comparator]
[image-comparator method="fade-in" width="99%" value="0" link_images="false" overlayed_slider="false" classes="hover"]
[image-comparator-left] <h1><span style="color: #0000ff;">Slide to see the difference</span></h1>
[/image-comparator-left]
[image-comparator-right] <h1><span style="color: #ff0000;">Slide to see the difference</span></h1>
[/image-comparator-right]
[/image-comparator]