Prejor Power-Diffuser - It states that it is effective against prejoran vessels. The current mission states problem from "old toys" (prejor vessels?)
I do not see any damage difference before and after installing this diffusers. So is there actually any use for the "effective against prejoran vessels"? Hope it's not all text only

Yes, unfortunately its just flavor text

Disappointing in a sense . At least its more useful than the prejor slave barrier I think.