Just a followup. Problem have been solved, and I thought I would share it here.

Please consider making the Premium version functional in future update without all this custom CSS stuff 🙂 I would think alot of people would like to use both plugins in theis premium version..

The solution was:

I fixed the issue adding following CSS code in Appearance -> Customize -> Additional CSS

table.compare-list .remove {
z-index: 100;
position: relative;
}

.yith-wcbm-badge-image {
z-index: 50;
}