Overlap of universal plat skills doubles the effect or wastes it?

E.g. dogface, halo and caine’s Plat skills. Having 2 heroes doubles the effect or just uses the stronger one and wastes the other?

They overlap. You can see this in action when you look at your Hero icons when you play a mission. Their should be a whole lot of blue icons underneath each Hero.

The icons dont overlap. If u hav 2 dogfaces, there will only be 1 plat icon for every1 not 2.

Yeah, what sss said. Should’ve worded my response better.